JP2020057830A - Terminal device and method - Google Patents

Abstract

To perform communication efficiently.SOLUTION: A terminal device includes an uplink power control unit that does not apply a first correction value obtained by a TPC command included in a first DCI format to the transmission power of a PUSCH, and applies a second correction value obtained by the TPC command included in a second DCI format to the transmission power of a sPUSCH when a subframe m is a subframe after a subframe n and a subframe m+B transmitting the sPUSCH is a subframe before a subframe n+A transmitting the PUSCH, and when a transmission subframe of the PUSCH and the transmission subframe of the sPUSCH belong to the same uplink power control subframe set in a first serving cell.SELECTED DRAWING: Figure 4

Description

  An embodiment of the present invention relates to a technology of a terminal device and a method for realizing efficient communication.

In 3GPP (3rd General Partnership Project), which is a standardization project, OFDM (Orthogonal Frequency)
A standardized EUTRA (Evolved Universal Terrestrial Radio Access) that realizes high-speed communication has been standardized by adopting a division multiplexing (Division Multiplexing) communication scheme and flexible scheduling in predetermined frequency / time units called resource blocks. It should be noted that overall communication employing the standardized technology in EUTRA may be referred to as LTE (Long Term Evolution) communication.

  In 3GPP, A-EUTRA (Advanced EUTRA) which realizes higher-speed data transmission and has upward compatibility with EUTRA is being studied. In EUTRA, a communication system was premised on a network in which base station devices had substantially the same cell configuration (cell size). In A-EUTRA, base station devices (cells) having different configurations were mixed in the same area. Communication systems based on existing networks (heterogeneous wireless networks and heterogeneous networks) are being studied.

  Further, a technique for reducing a processing time related to communication has been studied (Non-Patent Document 1).

“3GPP TR 36.881 v.0.5.0 (2015-11)”, R2-157181, 4th Dec. 2015.

  In a communication device (terminal device and / or base station device), efficient communication may not be performed by conventional transmission power control or transmission control.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a terminal device and a method capable of performing transmission power control and transmission control for efficient communication.

(1) In order to achieve the above object, the present invention has taken the following measures. That is, a terminal device according to an aspect of the present invention is a terminal device that communicates with a base station device, and includes a receiving unit that receives a Downlink Control Information (DCI) format including a Transmission Power Control (TPC) command, and a subframe n. When the first DCI format is detected in subframe n + A, a PUSCH (Physical Uplink) corresponding to the first DCI format is detected in subframe n + A.
When the second DCI format is detected in subframe m, a sPUSCH (shortened PUSCH) corresponding to the second DCI format is transmitted in subframe m + B, and B is smaller than A. The transmission unit and the subframe m are subframes after the subframe n, and the subframe m + B for transmitting the sPUSCH is a subframe before the subframe n + A for transmitting the PUSCH. If the transmission subframe of the PUSCH and the transmission subframe of the sPUSCH belong to the same uplink power control subframe set in the first serving cell, the One An uplink in which a positive value is not applied to the transmission power of the PUSCH, and a second correction value obtained by a TPC command included in the second DCI format is applied to the transmission power of the sPUSCH. A link power control unit.

  (2) The method according to an aspect of the present invention is a method in a terminal device communicating with a base station device, the method including receiving a DCI (Downlink Control Information) format including a Transmission Power Control (TPC) command, Upon detecting the first DCI format in subframe n, transmitting a PUSCH (Physical Uplink Shared Channel) corresponding to the first DCI format in subframe n + A, and detecting the second DCI format in subframe m Then, transmitting a sPUSCH (shortened PUSCH) corresponding to the second DCI format in a subframe m + B, Is small, the subframe m is a subframe after the subframe n, and the subframe m + B for transmitting the sPUSCH is a subframe before the subframe n + A for transmitting the PUSCH, And, when the transmission subframe of the PUSCH and the transmission subframe of the sPUSCH belong to the same uplink power control subframe set in the first serving cell, a first obtained by a TPC command included in the first DCI format. Applying the correction value to the transmission power of the PUSCH, and applying the second correction value obtained by the TPC command included in the second DCI format to the transmission power of the sPUSCH. And

  According to the present invention, transmission efficiency can be improved in a wireless communication system in which a base station device and a terminal device communicate.

FIG. 2 is a diagram illustrating an example of a downlink radio frame configuration according to the first embodiment. FIG. 2 is a diagram illustrating an example of an uplink radio frame configuration according to the first embodiment. FIG. 6 is a diagram illustrating a value of K _PUSCH corresponding to each uplink subframe of a TDD UL / DL configuration according to the first embodiment. Is a diagram illustrating a correspondence relationship f _{c (i)} of the DCI format and each sub-frame including a TPC command according to the first embodiment. FIG. 3 is a diagram illustrating an example of a block configuration of a base station device according to the first embodiment. FIG. 2 is a diagram illustrating an example of a block configuration of a terminal device according to the first embodiment.

<First embodiment>
The first embodiment of the present invention will be described below. A description will be given using a communication system in which a base station device and a terminal device communicate in one or a plurality of cells. The base station device may be referred to as a node B, an eNB (EUTRAN NodeB, an evolved NodeB), or a TRP (Transmission and / or Reception Point). The terminal device may be referred to as a mobile station device, a user device, or a UE (User equipment).

  Main physical channels, physical signals, and frame structures used in the present embodiment will be described. Here, the channel means a medium used for signal transmission (propagation, transmission). A physical channel refers to a physical medium used for transmitting a signal. In the present embodiment, a physical channel may be used synonymously with a physical signal. Physical channels may be added in the LTE in the future, or their structure / configuration or format may be changed or added, but even if they are changed and / or added to the configuration of conventional physical channels, It does not affect the description of the embodiment.

  The frame structure type according to the present embodiment will be described. Note that the frame structure type may be associated with the duplex mode. Duplex is a method for exchanging information between two points (for example, between a base station device and a terminal device). Duplex is also called two-way communication. The duplex mode includes an FDD (Frequency Division Duplex) and a TDD (Time Division Duplex).

  FDD can perform communication simultaneously using different frequencies for the downlink and the uplink. TDD can perform communication using the same frequency in the downlink and the uplink.

  Frame structure type 1 (FS1) applies to FDD. That is, FS1 is applied to cell operations that support FDD. The FS1 is applicable to both FD-FDD (Full Duplex-FDD) and HD-FDD (Half Duplex-FDD).

  In FDD, the frequency domain used for each of downlink transmission and uplink transmission is divided. In other words, the frequency domain is defined for each of downlink transmission and uplink transmission. That is, different carrier frequencies are applied for downlink transmission and uplink transmission. Here, a frequency region including a carrier frequency (center frequency) used for downlink transmission and / or uplink transmission may be referred to as an operating band.

  In FDD, 10 subframes are available for each of downlink transmission and uplink transmission.

  In FDD, operating bands for downlink transmission and uplink transmission may be associated with one index. That is, by selecting one index, the frequency domain used for downlink transmission and the frequency domain used for uplink transmission may be determined.

  In the HD-FDD operation, the terminal device cannot transmit and receive at the same time, but in the FD-FDD operation, the terminal device can transmit and receive at the same time.

  Further, there are two types of HD-FDD. For Type A HD-FDD operation, the guard period is determined by the terminal by not receiving the last part (last symbol) of the downlink subframe immediately before the uplink subframe from the same terminal. Generated.

  For Type B HD-FDD operation, the guard period, referred to as the HD guard subframe, does not receive the downlink subframe immediately before the uplink subframe from the same terminal device, and This is generated by the terminal device by not receiving the downlink subframe immediately after the uplink subframe from the terminal device. That is, in the HD-FDD operation, the terminal device controls the reception process of the downlink subframe to generate the guard period. Note that the symbol may include either an OFDM symbol or an SC-FDMA symbol.

Frame structure type 2 (FS2) applies to TDD. That is, FS2 is applied to TDD supported cell operations. Each radio frame is composed of two half frames. Each half frame is composed of five subframes. The UL-DL settings in a certain cell may be changed between radio frames. Control of subframes in uplink or downlink transmission may be performed in the latest radio frame. The terminal device can acquire the UL-DL configuration in the latest radio frame via PDCCH / EPDCCH or higher layer signaling. The UL-DL configuration or UL / DL configuration (TDD UL / DL configuration) indicates the configuration of an uplink subframe, a downlink subframe, and a special subframe in TDD. UL / DL settings may be referred to as subframe assignments. The special subframe is a Downlink Pilot Time (DwPTS) capable of downlink transmission.
Slot, Guard Period (GP), and UpPTS (Uplink Pilot Time Slot) that can be used for uplink transmission. The configuration of DwPTS and UpPTS in the special subframe is managed in a table, and the terminal device can acquire the configuration via higher layer signaling. Note that the special subframe is a switching point from the downlink to the uplink. That is, the terminal device transitions from reception to transmission at the switching point, and the base station device transitions from transmission to reception. The switching point has a 5 ms period and a 10 ms period. If the switching point has a period of 5 ms, the special subframe exists in both half frames. When the switching point has a period of 10 ms, the special subframe exists only in the first half frame.

  When two symbols are allocated to UpPTS, SRS and PRACH preamble format 4 can be arranged.

Further, in TDD, an eIMTA (TDD Enhanced Interference Management and Traffic Adaptation) technique in consideration of the communication amount (traffic amount) and interference of each cell can be applied. The eITMA dynamically changes the TDD setting (using the L1 level or L1 signaling) in consideration of downlink and / or uplink communication and interference amounts, so that the TDD setting in the radio frame (ie, 10 This is a technique for changing the ratio of a downlink subframe and an uplink subframe to a subframe, and performing optimal communication.

  NCP (Normal Cyclic Prefix) and ECP (Extended Cyclic Prefix) are applied to FS1 and FS2.

Frame structure type 3 (FS3) is applied to LAA (Licensed Assisted Access) secondary cell operation. Further, only the NCP may be applied to the FS3. Ten subframes included in the radio frame are used for downlink transmission. The terminal device treats the subframe as an empty subframe without assuming that any signal is present in the subframe unless specified or unless a downlink transmission is detected in the subframe. Downlink transmissions occupy one or more consecutive subframes. Successive subframes may include a first subframe and a last subframe. That is, a continuous subframe may be composed of at least two subframes. Consecutive subframes include more than one continuous subframe in the time domain. The first subframe starts with any symbol or slot of that subframe (eg, OFDM symbol # 0 or # 7). Also, the last subframe is occupied by a full subframe (ie, 14 OFDM symbols) or the number of OFDM symbols indicated based on one of the DwPTS periods (ie, the number of symbols allocated to DwPTS). You. Whether or not a certain subframe is the last subframe among consecutive subframes is indicated to the terminal device by a certain field (that is, DCI) included in the DCI format. The field may further indicate the number of OFDM symbols used for the subframe in which the field is detected or the next subframe. In FS3, the base station apparatus and the terminal apparatus perform a channel access procedure related to an LBT (Listen Before Talk) before transmitting the related downlink / uplink. That is, in the channel access procedure, when the transmitting side determines that the channel used for transmission is clear, the transmitting side base station apparatus and / or terminal apparatus can perform transmission. Note that the LAA secondary cell may be referred to as an LAA cell.

  Note that in FS3, uplink transmission may be supported. An uplink transmission may occupy one or more consecutive subframes. At this time, the terminal device supporting only downlink transmission in the LAA cell, and the terminal device supporting downlink transmission and uplink transmission in the LAA cell, by transmitting the capability information of the terminal device, The communication method supported by the own device may be notified.

  The terminal device and the base station device supporting FS3 may perform communication in an unlicensed frequency band.

  The operating band corresponding to the LAA or FS3 cell may be managed together with the EUTRA operating band table. For example, the EUTRA operating band index may be managed from 1 to 44, and the operating band index corresponding to the LAA (or LAA frequency) may be managed at 46. For example, the index 46 may specify only the downlink frequency band. Also, in some indexes, the uplink frequency band may be reserved or reserved in advance as specified in the future. Further, the duplex mode corresponding to the operating band corresponding to the LAA or FS3 cell may be TDD. The frequency at which LAA operation can be performed is preferably 5 GHz or more, but may be less than 5 GHz. That is, LAA operation communication may be performed at the frequency associated with the operating band corresponding to the LAA.

  Next, downlink and uplink radio frame configurations according to the present embodiment will be described.

  FIG. 1 is a diagram illustrating an example of a downlink radio frame configuration according to the present embodiment. For the downlink, the OFDM access method is used.

In downlink wireless communication from a base station apparatus to a terminal apparatus, the following downlink physical channels are used. Here, the downlink physical channel is used for transmitting information output from an upper layer.
・ PBCH (Physical Broadcast Channel)
・ PCFICH (Physical Control Format Indicator Channel)
・ PHICH (Physical Hybrid automatic repeat request Indicator Channel)
・ PDCCH (Physical Downlink Control Channel)
・ EPDCCH (Enhanced Physical Downlink Control Channel)
・ SPDCCH (short / shorter / shortened Physical Downlink Control Channel, PDCCH
for sTTI)
・ PDSCH (Physical Downlink Shared Channel)
・ SPDSCH (short / shorter / shortened Physical Downlink Shared Channel, PDSCH for sTTI)
・ PMCH (Physical Multicast Channel)

In downlink radio communication, the following downlink physical signals are used. Here, the downlink physical signal is not used for transmitting information output from the upper layer, but is used by the physical layer.
・ Synchronization signal (SS)
・ Downlink Reference Signal (DL RS)
・ DS (Discovery Signal)

In the present embodiment, the following five types of downlink reference signals are used.
・ CRS (Cell-specific Reference Signal)
-URS (UE-specific Reference Signal) related to PDSCH
-DMRS (Demodulation Reference Signal) related to EPDCCH
・ NZP CSI-RS (Non-Zero Power Chanel State Information-Reference Signal)
・ ZP CSI-RS (Zero Power Chanel State Information-Reference Signal)
・ MBSFN RS (Multimedia Broadcast and Multicast Service over Single Frequency Network Reference signal)
・ PRS (Positioning Reference Signal)

  A downlink radio frame is composed of a downlink resource block (RB) pair. The downlink RB pair is a unit such as allocation of downlink radio resources, and includes a frequency domain (for example, RB bandwidth) and a time domain (for example, two slots = 1 slot) having a predetermined width. Sub-frame). One downlink RB pair is composed of two downlink RBs (RB bandwidth × slot) continuous in the time domain. One downlink RB is composed of 12 subcarriers in the frequency domain. Further, in the time domain, it is composed of seven OFDM symbols when an NCP is added and six OFDM symbols when an ECP having a CP length longer than the NCP is added. An area defined by one subcarrier in the frequency domain and one OFDM symbol in the time domain is called a resource element (RE). The PDCCH / EPDCCH is a physical channel on which downlink control information (DCI) such as a terminal device identifier, PDSCH scheduling information, PUSCH scheduling information, a modulation scheme, a coding rate, and retransmission parameters is transmitted. Although the downlink subframe in one component carrier (CC) is described here, the downlink subframe is defined for each CC, and the downlink subframe is substantially synchronized between CCs. Here, being substantially synchronized between CCs means that, when transmitting from a base station apparatus using a plurality of CCs, an error in the transmission timing of each CC falls within a predetermined range.

Although not shown here, SS, PBCH and DLRS may be arranged in the downlink subframe. The DLRS includes a CRS transmitted on the same antenna port (transmission port) as the PDCCH, a CSI-RS used for measuring channel state information (CSI), a UERS transmitted on the same antenna port as some PDSCHs, and an EPDCCH. There are DMRS transmitted on the same transmission port. In addition, the DLRS may include an RS arranged in a carrier in which the CRS is not arranged. At this time, in some subframes (for example, the first and sixth subframes in the radio frame), some antenna ports (for example, antenna port) of the CRS are used as signals for tracking time and / or frequency. 0) or a signal similar to a signal corresponding to all antenna ports (referred to as an extended synchronization signal) can be inserted. Here, the antenna port may be referred to as a transmission port. Here, “the physical channel / physical signal is transmitted at the antenna port” means that the physical channel / physical signal is transmitted using a radio resource or a layer corresponding to the antenna port. For example, the receiving unit means receiving a physical channel or a physical signal from a radio resource or a layer corresponding to an antenna port.

  FIG. 2 is a diagram illustrating an example of an uplink radio frame configuration according to the present embodiment. For the uplink, the SC-FDMA scheme is used.

The following uplink physical channel is used in uplink wireless communication from a terminal device to a base station device. Here, the uplink physical channel is used for transmitting information output from an upper layer.
・ PUCCH (Physical Uplink Control Channel)
・ SPUCCH (short / shorter / shortened Physical Uplink Control Channel, PUCCH for short TTI)
・ PUSCH (Physical Uplink Shared Channel)
・ SPUSCH (short / shorter / shortened Physical Uplink Shared Channel, PUSCH for short TTI)
・ PRACH (Physical Random Access Channel)
・ SPRACH (short / shorter / shortened Physical Random Access Channel, PRACH for short TTI)

In uplink wireless communication, the following uplink physical signals are used. Here, the uplink physical signal is not used for transmitting information output from the upper layer, but is used by the physical layer.
・ Uplink Reference Signal (UL RS)

In the present embodiment, the following two types of uplink reference signals are used.
・ DMRS (Demodulation Reference Signal)
・ SRS (Sounding Reference Signal)

  In the uplink, PUSCH, PUCCH, and the like are allocated. ULRS is allocated together with PUSCH and PUCCH. An uplink radio frame is composed of an uplink RB pair. The uplink RB pair is a unit such as allocation of uplink radio resources, and includes a frequency domain (RB bandwidth) having a predetermined width and a time domain (two slots = 1 subframe). Become. One uplink RB pair is composed of two uplink RBs (RB bandwidth × slot) that are continuous in the time domain. One uplink RB is composed of 12 subcarriers in the frequency domain. In the time domain, it is composed of seven SC-FDMA symbols when NCP is added and six SC-FDMA symbols when ECP is added. Although the uplink subframe in one CC is described here, the uplink subframe may be defined for each CC.

Time unit _{T s} of LTE, subcarrier spacing (e.g., 15 kHz) and FFT size (e.g., 2048) is defined based on the. That is, T _s is 1 / (15000 × 2
048) seconds. The time length of one slot is 15360 · T _s (that is, 0.5 ms). The time length of one subframe is 30720 · T _s (that is, 1 ms). The time length of one radio frame is 307200 · T _s (that is, 10 ms). Note that when the bandwidth is extended or the subcarrier interval changes, the FFT size may change as needed.

  The scheduling of a physical channel or a physical signal is managed using a radio frame. The time length of one radio frame is 10 milliseconds (ms). One radio frame is composed of 10 subframes. Further, one subframe is composed of two slots. That is, the time length of one subframe is 1 ms, and the time length of one slot is 0.5 ms. In addition, management is performed using a resource block as a minimum unit of scheduling in which a physical channel is arranged. The resource block is defined by a fixed frequency region configured by a set of a plurality of subcarriers (for example, 12 subcarriers) on a frequency axis and a region configured by a fixed transmission time interval (TTI, slot, symbol). . One subframe may be referred to as one resource block pair.

  Further, one TTI may be defined as one subframe or the number of symbols constituting one subframe. For example, in the case of NCP, one TTI may be composed of 14 symbols. In the case of ECP, one TTI may be configured with 12 symbols. The TTI may be defined on the receiving side as a receiving time interval. The TTI may be defined as a transmission unit or a reception unit of a physical channel or a physical signal. That is, the time length of the physical channel or the physical signal may be defined based on the length of the TTI. Note that the symbols may include SC-FDMA symbols and / or OFDM symbols. The TTI length (TTI length) may be represented by the number of symbols. Further, the TTI length may be represented by a time length such as millisecond (ms) or microsecond (μs). Note that, for the same CP length and / or the same type of CP, the number of symbols constituting one TTI is small (for example, less than 14 symbols in NCP), or the TTI length is shorter than 1 ms-TTI. This TTI may be referred to as sTTI (short / shortened / shorter TTI).

  A sequence related to a physical channel and / or a physical signal is mapped to each symbol. In order to improve the sequence detection accuracy, a CP is added to a sequence related to a physical channel and / or a physical signal.

  The TTI length of sTTI (DL-sTTI) for downlink transmission may be set to either 2 symbols or 7 symbols. Also, the TTI length of sTTI (UL-sTTI) for uplink transmission may be set to 2 symbols, or 3 or 4 symbols, or 7 symbols. The sPDCCH and the sPDSCH may be arranged in the DL-sTTI. Note that the TTI length of each of the uplink physical channels (for example, sPUSCH, sPUCCH, and sPRACH) may be set individually. The sPDSCH TTI length may include an sPDCCH symbol or a PDCCH symbol. Further, the TTI length of sPUSCH and / or sPUCCH may include a DMRS symbol or an SRS symbol. The TTI length of the sTTI for downlink transmission may be set via higher layer signaling. The TTI length of sTTI for downlink transmission may be set via system information. The TTI length of the sTTI for uplink transmission may be set via higher layer signaling. The TTI length of the sTTI for uplink transmission may be set based on certain fields in the DCI format.

FIGS. 1 and 2 show examples where different physical channels / physical signals are frequency division multiplexed (FDM) and / or time division multiplexed (TDM).

  When various physical channels and / or physical signals are transmitted for sTTI, each physical channel and / or physical signal may be referred to as sPDSCH, sPDCCH, sPUSCH, sPUCCH, and sPRACH, respectively.

  The sPDSCH, sPDCCH, sPUSCH, sPUCCH, sPRACH may be defined as a short format or a different type for each physical channel (PDSCH, PDCCH, PUSCH, PUCCH, PRACH). Further, PDSCH, PDCCH, PUSCH, PUCCH, and PRACH may be defined as a long format for each physical channel.

  Transmission of the sPDSCH, sPDCCH, sPUSCH, sPUCCH, and sPRACH in the MBSFN subframe may be set based on a certain upper layer parameter. That is, if downlink transmission and / or uplink transmission in the MBSFN subframe is set based on a certain upper layer parameter, the terminal device monitors sPDCCH and sPDSCH in the MBSFN subframe, and performs sPUSCH / sPUCCH / SPRACH may be transmitted.

  When a physical channel is transmitted for the sTTI, the number of OFDM symbols and / or SC-FDMA symbols constituting the physical channel, or the OFDM symbols and / or SC-FDMA used for transmission of the physical channel. The number of symbols may be less than 14 symbols in NCP (12 symbols in ECP). Also, the number of symbols used for the physical channel for sTTI may be set using DCI and / or DCI format, or may be set using higher layer signaling. Not only the number of symbols used for sTTI but also a start symbol in the time direction may be set. Note that a transmission unit of 14 symbols in NCP (12 symbols in ECP) may be referred to as TTI.

  Also, the sTTI may be transmitted within a specific bandwidth within the system bandwidth. The bandwidth set as the sTTI may be set using DCI and / or the DCI format, or may be set using higher layer signaling (RRC signaling, MAC CE). The bandwidth may be set using the start and end resource block index or frequency position, or may be set using the bandwidth and the start resource block index / frequency position. The bandwidth to which the sTTI is mapped may be referred to as an sTTI band. Physical channels mapped within an sTTI band may be referred to as physical channels for sTTI. Physical channels for sTTI may include sPDSCH, sPDCCH, sPUSCH, sPUCCH, and sPRACH.

  If the information / parameters used to define the sTTI are configured using DCI and / or DCI format, those DCI and / or DCI format may be scrambled using a specific RNTI, A CRC (Cyclic Redundancy Check) scrambled by the RNTI may be added to a bit string constituting the DCI format.

  Here, the downlink physical channel and the downlink physical signal are collectively referred to as a downlink signal. In addition, the uplink physical channel and the uplink physical signal are collectively referred to as an uplink signal. The downlink physical channel and the uplink physical channel are collectively referred to as a physical channel. A downlink physical signal and an uplink physical signal are collectively referred to as a physical signal.

  The PBCH is used to broadcast a master information block (MIB, Broadcast Channel: BCH) commonly used in the terminal device.

  PCFICH is used for transmitting information indicating a time domain (OFDM symbol) used for transmitting the PDCCH.

PHICH is the uplink data (Uplink Shared) received by the base station apparatus.
Channel: used to transmit an HARQ indicator (HARQ feedback, response information) indicating ACK (ACKnowledgement) or NACK (Negative ACKnowledgement) for UL-SCH. That is, the PHICH is a physical channel that includes information indicating success or failure in detection (and / or decoding) of the PUSCH in the base station device.

  The PDCCH, EPDCCH, and / or sPDCCH are used to transmit downlink control information (DCI). In the present embodiment, the PDCCH may include the EPDCCH. Further, the PDCCH may include the sPDCCH.

  The sPDCCH may be a PDCCH and / or an EPDCCH with limited frequency domain and / or time domain mapping. In addition, the sPDCCH may be such that the sPDSCH is mapped to the same sTTI. The configuration for the sPDCCH may be configured via higher layer signaling. The setting for the sPDCCH may be set via system information. The setting for the sPDCCH may be set via a certain field of a certain DCI format included in the PDCCH / EPDCCH.

  Here, a plurality of DCI formats may be defined for the DCI transmitted on the PDCCH, EPDCCH, and / or sPDCCH. That is, a field for DCI may be defined by a DCI format and mapped to information bits.

  When a physical channel for sTTI can be transmitted in a certain serving cell, that is, in a terminal device and a base station device in a certain serving cell, the terminal device transmits a PDCCH / EPDCCH mapped with a DCI format including information / parameters related to sTTI setting. It may be monitored. That is, the base station apparatus maps a DCI format including information / parameters related to sTTI setting to PDCCH / EPDCCH for a terminal apparatus supporting transmission and / or reception of a physical channel using sTTI. May be sent. The details of the DCI format will be described later.

  The sPDSCH may be scheduled with a first downlink grant detected on the PDCCH and / or EPDCCH and a second downlink grant detected on the sPDCCH. Both the first downlink grant and the second downlink grant may be scrambled using a specific RNTI.

  The sPDSCH may be scheduled using one downlink grant (ie, one DCI, one DCI format).

  The sPDSCH may be scheduled using two downlink grants (ie, two DCIs, two DCI formats).

Whether to be scheduled in one downlink grant or two downlink grants may be set based on upper layer parameters included in system information or upper layer signaling.

  The sPUSCH may be scheduled using one uplink grant (ie, one DCI, one DCI format).

  The sPUSCH may be scheduled using two uplink grants (ie, two DCIs, two DCI formats).

  Whether to be scheduled with one uplink grant or two uplink grants may be set based on upper layer parameters included in system information or upper layer signaling.

  In the sPDCCH, a region for monitoring the sPDCCH (that is, a downlink sTTI band) may be set based on DCI included in the first downlink grant detected on the PDCCH and / or the EPDCCH. The region for monitoring the sPDCCH may include information on a time region for monitoring the sPDCCH. Further, the area for monitoring the sPDCCH may include information on a frequency area for monitoring the sPDCCH.

  The resource of the sPUCCH may be determined by DCI included in the second downlink grant detected on the sPDCCH.

  In addition, the terminal device may monitor a set of PDCCH candidates, EPDCCH candidates, and / or sPDCCH candidates. Hereinafter, PDCCH may include EPDDCH and / or sPDCCH.

  Here, the PDCCH candidate may indicate a candidate where the PDCCH may be arranged and / or transmitted by the base station apparatus. The term “monitor” may include a meaning that the terminal device attempts to decode each of the PDCCHs in the set of PDCCH candidates according to all the DCI formats to be monitored.

  Here, the set of PDCCH candidates monitored by the terminal device is also referred to as a search space. The search space may include a common search space (CSS). For example, the CSS may be defined as a common search space for a plurality of terminal devices.

  Further, the search space may include a user equipment specific search space (USS). For example, the USS may be given based at least on the C-RNTI assigned to the terminal device. The terminal device may monitor the PDCCH in CSS and / or USS and detect the PDCCH addressed to the terminal device.

  Further, the search space may include a search space shared by a plurality of terminal devices, in addition to the CSS. For example, this USS may be referred to as a terminal device group search space (UEG-SS) or a cell sharing search space (CC-SS). UEG-SS may be provided based on a common RNTI for at least a plurality of terminal devices. The terminal device may monitor the PDCCH in the UEG-SS and detect the PDCCH addressed to the terminal device.

  The terminal device can acquire the DCI included in the DCI format addressed to the own device by detecting and decoding the PDCCH addressed to the own device.

  In CSS and / or USS, a terminal device in PUSCH transmission mode 1 can decode a PDCCH with a CRC scrambled by C-RNTI, and can acquire DCI format 0.

  In CSS and / or USS, a terminal device in PUSCH transmission mode 2 can decode a PDCCH with a CRC scrambled by C-RNTI, and can acquire DCI format 4.

  In the CSS, the terminal device can decode the PDCCH with the CRC scrambled by the temporary C-RNTI, and can acquire DCI format 0. A PUSCH may be scheduled by the DCI format 0 for a terminal device capable of sTTI operation.

  In the CSS, the terminal device can decode the PDCCH with the CRC scrambled by the TPC-PUCCH-RNTI, and can acquire the DCI format 3 / 3A. A TPC command for the PUCCH may be transmitted by the DCI format 3 / 3A to a terminal device capable of performing the sTTI operation.

  In the CSS, the terminal device can decode the PDCCH with the CRC scrambled by the TPC-PUSCH-RNTI, and can obtain the DCI format 3 / 3A. A TPC command for the PUSCH may be transmitted by the DCI format 3 / 3A to the terminal device capable of performing the sTTI operation.

  In CSS, a terminal device capable of sTTI operation can decode PDCCH and / or sPDCCH with CRC scrambled by C-RNTI, and can acquire DCI format 0. A PUSCH may be scheduled by the DCI format 0 for a terminal device capable of sTTI operation.

  In the USS, a terminal device capable of sTTI operation can decode a PDCCH and / or sPDCCH accompanied by a CRC scrambled by C-RNTI, and can acquire DCI format 0/4 / X. For a terminal device capable of sTTI operation, sPUSCH may be scheduled in the DCI format 0/4 / X.

  In UEG-SS, a terminal device capable of sTTI operation can decode PDCCH and / or sPDCCH with CRC scrambled by C-RNTI, and can acquire DCI format 0/4 / X.

  In UEG-SS, a terminal device capable of sTTI operation can decode PDCCH and / or sPDCCH with CRC scrambled by TPC-sPUCCH-RNTI, and acquire DCI format 3 / 3A / Z. it can.

  In UEG-SS, a terminal device capable of sTTI operation can decode PDCCH and / or sPDCCH with CRC scrambled by TPC-sPUSCH-RNTI, and can acquire DCI format 3 / 3A / Z. it can.

Here, the sTTI operation refers to performing communication using the above-described sTTI;
Alternatively, communication is performed using at least one of the above physical channels using the sTTI, for example, sPDSCH, sPDCCH, sPUSCH, sPUCCH, and sPRACH. That is, the sTTI operation refers to an operation related to communication (that is, transmission and reception) performed by the terminal device and the base station device to which the sTTI is set. The sTTI operation includes sTTI or sTTI-related reception processing, modulation / demodulation processing, coding, decoding, RRM (Radio Resource Management) measurement, channel evaluation (or CSI measurement), synchronization processing, ACK / NACK. Processing (HARQ-ACK processing) may be included.

  The terminal device capable of performing the sTTI operation and capable of detecting the PCFICH is based on the PDCCH region indicated by the PCFICH (that is, the number of OFDM symbols allocated to the PDCCH). The pattern may be able to be estimated. For example, when PCFICH indicates three symbols, the sTTI pattern of the subframe may be three symbols sTTI, two symbols sTTI, two symbols sTTI, three symbols sTTI, two symbols sTTI, and two symbols sTTI.

  The PDSCH is used to transmit downlink data (Downlink Shared Channel: DL-SCH). PDSCH is used for transmitting a system information message. Here, the system information message may be cell-specific information. Further, the system information may be included in the RRC signaling. Also, PDSCH may be used for transmitting RRC signaling and MAC control elements.

  Also, the PDSCH may be used to transmit an uplink grant. For example, the terminal device may receive (detect and decode) an uplink grant (information included in the uplink grant) on the PDSCH scheduled by the base station device.

  The PMCH is used for transmitting multicast data (Multicast Channel: MCH).

  The synchronization signal is used by the terminal device to synchronize the downlink frequency domain and the time domain. In the TDD system, a synchronization signal is arranged in subframes 0, 1, 5, and 6 in a radio frame. In the FDD system, a synchronization signal is arranged in subframes 0 and 5 in a radio frame.

  The downlink reference signal is used by the terminal device to perform channel correction of the downlink physical channel. Here, the downlink reference signal is used by the terminal device to calculate downlink channel state information.

  The DS is used for time-frequency synchronization, cell identification, and RRM measurement (intra and / or inter-frequency measurement) at a frequency in which parameters related to the DS are set. The DS is composed of a plurality of signals, and these signals are transmitted at the same cycle. The DS is configured using PSS / SSS / CRS resources, and may be further configured using CSI-RS resources. In DS, RSRP and RSRQ may be measured using resources to which CRS and CSI-RS are mapped.

BCH, MCH, UL-SCH and DL-SCH are transport channels. Channels used in the medium access control (MAC) layer are called transport channels. The unit of the transport channel used in the MAC layer is represented by a transport block (
TB) or MAC PDU (Protocol Data Unit). In the MAC layer, HARQ (Hybrid Automatic Repeat reQuest) control is performed for each transport block. The transport block is a unit of data that the MAC layer passes (deliver) to the physical layer. In the physical layer, transport blocks are mapped to codewords, and encoding is performed for each codeword.

  The PUCCH and / or sPUCCH is used to transmit (or feed back) uplink control information (UCI). Hereinafter, PUCCH may include sPUCCH. Here, the UCI may include channel state information (CSI) used to indicate a state of a downlink channel. Further, the UCI may include a scheduling request (SR) used to request a UL-SCH resource. In addition, the UCI may include HARQ-ACK (HARQ-ACKnowledgement).

  Here, HARQ-ACK may indicate HARQ-ACK for downlink data. That is, HARQ-ACK may indicate ACK (Acknowledgement, positive-acknowledgment) or NACK (Negative-acknowledgment) for downlink data. Note that the downlink data may include a transport block, a MAC PDU, a DL-SCH, and a PDSCH. Also, the CSI may be configured with a channel quality indicator (CQI), a precoding matrix indicator (PMI), and / or a rank indication (RI). HARQ-ACK may be referred to as HARQ-ACK response.

  The format of the PUCCH may be defined according to the type and combination of the UCI to be transmitted.

  PUCCH format 1 is used for transmitting a positive SR.

  PUCCH format 1a is used to transmit 1-bit HARQ-ACK or, in the case of FDD or FDD-TDD primary cell FS1, 1-bit HARQ-ACK with positive SR. Note that the FDD-TDD primary cell FS indicates the frame structure type (FS) of the primary cell when performing FDD-TDD carrier aggregation (FDD-TDD CA). That is, in FDD-TDD CA, it can be rephrased as a primary cell of a certain frame structure type. In addition, the same can be shown for the secondary cell. FDD-TDD CA is a carrier aggregation including at least one FDD component carrier (that is, an FDD cell) and at least one TDD component carrier (that is, a TDD cell).

  PUCCH format 1b is used for transmitting a 2-bit HARQ-ACK or a 2-bit HARQ-ACK with a positive SR.

  In addition, PUCCH format 1b uses channel selection to select up to 4 bits when more than one serving cell is set in the terminal device or, in the case of TDD, when one serving cell is set in the terminal device. It may be used to transmit HARQ-ACK.

In the channel selection, the interpretation of the same bit value can be changed by selecting any one of a plurality of PUCCH resources. For example, even if the first PUCCH resource and the second PUCCH resource have the same bit value, their contents may be different. HARQ-ACK can be extended by using a plurality of PUCCH resources by channel selection.

  PUCCH format 2 is used to transmit a CSI report when HARQ-ACK is not multiplexed.

  PUCCH format 2 may be used to transmit a CSI report multiplexed with HARQ-ACK for ECP.

  PUCCH format 2a is used to transmit a CSI report multiplexed with 1-bit HARQ-ACK for NCP.

  PUCCH format 2b is used to transmit a CSI report multiplexed with 2-bit HARQ-ACK for NCP.

  In the PUCCH format 2a / 2b where only NCP is supported, a certain bit string is mapped to one modulation symbol used for generating a DMRS for the PUCCH. That is, in PUCCH format 2a / 2b where only NCP is supported, DMRS symbols can be used as symbols to which data can be assigned.

  PUCCH format 3 includes HARQ-ACK of up to 10 bits for FDD or FDD-TDD primary cell FS1, HARQ-ACK of 20 bits for TDD, and HARQ-ACK of 21 bits for FDD-TDD primary cell FS2. Used to send

  PUCCH format 3 is composed of 10-bit HARQ-ACK for FDD or FDD-TDD and up to 11-bit UCI corresponding to 1-bit positive / negative SR, and 20-bit HARQ-ACK for TDD. And 21-bit UCI corresponding to 1-bit positive / negative SR, and up to 21-bit HARQ-ACK and 1-bit UCI corresponding to 1-bit positive / negative SR for FDD-TDD primary cell FS2, May be used to transmit

  PUCCH format 3 is composed of 10-bit HARQ-ACK for FDD or FDD-TDD and up to 11-bit UCI corresponding to 1-bit positive / negative SR, and 20-bit HARQ-ACK for TDD. And 21-bit UCI corresponding to 1-bit positive / negative SR, and up to 21-bit HARQ-ACK and 1-bit UCI corresponding to 1-bit positive / negative SR for FDD-TDD primary cell FS2, May be used to transmit

  PUCCH format 3 may also be used to transmit HARQ-ACK and 1-bit positive / negative SR (if any) and CSI reports.

  PUCCH format 4 is used to transmit more than 22 bits of UCI including HARQ-ACK, SR (if any), and periodic CSI reports (if any).

  PUCCH format 4 may also be used to transmit more than one CSI report and SR (if any).

  PUCCH format 5 is used to transmit more than 22 bits of UCI including HARQ-ACK, SR (if any), and periodic CSI report (if any).

  PUCCH format 5 may also be used to transmit more than one CSI report and SR (if any).

  The number and arrangement of the corresponding DMRSs may be different based on the PUCCH format. For example, when NCP is added, three DMRSs are arranged in one slot for PUCCH format 1 / 1a / 1b, and two DMRSs are arranged in one slot for PUCCH format 2 / 2a / 2b / 3. A DMRS is arranged, and one DMRS is arranged in one slot for PUCCH format 4/5.

  When the PUCCH is transmitted in the SRS subframe, in the PUCCH format to which the shortened format is applied (for example, PUCCH formats 1, 1a, 1b, and 3), the last one symbol to which the SRS may be assigned Alternatively, two symbols (the last one or two symbols of the second slot in the subframe) may be empty, that is, the PUCCH may be transmitted in the shortened format.

  PUCCH format 1 / 1a / 1b and PUCCH format 2 / 2a / 2b may be transmitted in the same RB. The cyclic shift for PUCCH format 1 / 1a / 1b in the RB used for transmission of PUCCH format 1 / 1a / 1b and PUCCH format 2 / 2a / 2b may be set individually.

  Note that an sPUCCH format corresponding to the above-described PUCCH format may be defined for the sPUCCH. Whether to transmit UCI or HARQ-ACK using each sPUCCH format may be set based on a certain upper layer parameter.

  The PUSCH and / or sPUSCH is used for transmitting uplink data (Uplink-Shared Channel: UL-SCH). Hereinafter, PUSCH may include sPUSCH. Also, the PUSCH may be used to transmit HARQ-ACK and / or CSI along with uplink data. Also, PUSCH may be used to transmit only CSI or only HARQ-ACK and CSI. That is, PUSCH may be used to transmit only UCI.

  Here, the base station apparatus and the terminal apparatus may exchange (transmit / receive) signals / information in the upper layer. For example, the base station device and the terminal device may transmit and receive RRC signaling in a radio resource control (RRC) layer. RRC signaling may be referred to as an RRC signal, RRC information, RRC message. Further, the base station device and the terminal device may exchange (transmit and receive) a MAC control element (MAC CE) in the MAC layer. Here, the RRC signaling and / or the MAC control element are also referred to as upper layer signals.

Here, in the present embodiment, “upper layer parameters”, “upper layer messages”, “upper layer signaling”, “upper layer signals”, “upper layer information”, and “upper layer information elements” May be the same. Also, “upper layer parameters”, “upper layer message”, “upper layer information”, and / or “upper layer information element” are transmitted as “upper layer signaling” or “upper layer signal”. It may be a “parameter”, a “message”, an “information”, and / or an “information element”.

  PUSCH may be used for transmitting RRC signaling and MAC control elements. Here, the RRC signaling transmitted from the base station device may be a common signal to a plurality of terminal devices in the cell. Further, the RRC signaling transmitted from the base station device may be signaling dedicated to a certain terminal device (also referred to as dedicated signaling). That is, the information unique to the user device may be transmitted to a certain terminal device using dedicated signaling.

  The PRACH and / or sPRACH is used for transmitting a random access preamble. Hereinafter, the PRACH may include the sPRACH. For example, PRACH (or a random access procedure) is used for the main purpose of allowing a terminal device to synchronize in the time domain with a base station device. The PRACH (or random access procedure) includes an initial connection establishment procedure, a handover procedure, a connection re-establishment procedure, synchronization (timing adjustment) for uplink transmission, and a scheduling request (PUSCH resource request, UL-SCH resource Request).

  DMRS relates to the transmission of PUSCH, sPUSCH and / or PUCCH. That is, DMRS may be time-multiplexed with PUSCH, sPUSCH, or PUCCH. For example, the base station apparatus may use DMRS to perform propagation path correction of PUSCH, sPUSCH, or PUCCH. In the DMRS, the arrangement of time multiplexing and the number of multiplexed DMRSs may be different depending on the type of the physical channel to be demodulated.

  SRS is not related to the transmission of PUSCH or PUCCH. For example, the base station apparatus may use the SRS to measure an uplink channel state or transmission timing. In the SRS, a trigger type 0 SRS to be transmitted when a related parameter is set by an upper layer signal, and a related parameter are set by an upper layer signal, and transmission is performed by an SRS request included in an uplink grant. There is a trigger type 1 SRS to send when requested.

  The sub-carrier intervals of the various physical channels and / or physical signals described above may be individually defined / set for each physical channel and / or physical signal. Further, the time length of one symbol of various physical channels and / or physical signals may be individually defined / set for each physical channel and / or physical signal. That is, the TTI length of various physical channels and / or physical signals may be individually defined / set for each physical channel and / or physical signal.

  In the present embodiment, CA (Carrier Aggregation) for performing communication using a plurality of cells (component carriers corresponding to the cells) may be performed. In CA, there are a primary cell (PCell) as a cell for establishing an initial access and an RRC connection, and a secondary cell that is added / changed / deleted / activated / deactivated using the primary cell. The setting related to the secondary cell may be transmitted to the terminal device via higher layer signaling from the primary cell.

In the present embodiment, DC (Dual Connectivity) for performing communication using a plurality of cells (component carriers corresponding to the cells) may be performed. In DC, two base station devices (MeNB (Master eNB), SeNB (Secondary)
eNB)), a group is formed by cells belonging to the respective groups. A cell group that belongs to MeNB and includes a primary cell is defined as an MCG (Master Cell Group), and a cell group that belongs to SeNB and includes a primary secondary cell (PSCell) is defined as an SCG (Secondary Cell Group). The primary secondary cell is a cell group that does not include the primary cell when a plurality of cell groups are set, that is, a cell having the same function as the primary cell in SCG (secondary cell, serving cell other than the primary cell). It is.

  The primary cell and the primary secondary cell play the role of the primary cell in each CG. Here, the primary cell may be a PUCCH and / or a control channel corresponding to the PUCCH, that is, a cell that is capable of transmitting and / or allocating a physical channel capable of transmitting UCI, and may be an initial access procedure. The cell may be a cell related to the / RRC connection procedure / initial connection establishment procedure, a cell capable of triggering a random access procedure by L1 signaling, or a cell monitoring a radio link. The cell may be a cell that supports semi-persistent scheduling, a cell that detects / determines RLF, or a cell that is always activated. In the present embodiment, a cell having a function of a primary cell and / or a primary secondary cell may be referred to as a special cell. For an LR (Latency Reduction) cell, a primary cell / primary secondary cell / secondary cell may be defined similarly to LTE. Hereinafter, the portion described as PCCell may include PSCell. The LR cell may be a cell that can perform communication using sTTI, or may be a cell that performs communication using a physical channel / physical signal whose processing time is shorter than before.

  In the present embodiment, the time domain may be represented by a time length or the number of symbols. Further, the frequency domain may be represented by the number of bandwidths and subcarriers, the number of resource elements in the frequency direction, and the number of resource blocks.

  In the LR cell, the size of the TTI may be changeable based on the type of the subframe, the configuration information of the upper layer, and the control information included in the L1 signaling (that is, the signaling using the PDCCH).

  In the LR cell, access that does not require a grant (an uplink grant and / or a downlink grant) may be possible. Note that an access that does not require a grant refers to an access that does not use control information (DCI format, downlink grant, uplink grant) that indicates a schedule of PDSCH or PUSCH (a downlink or uplink shared channel / data channel). That is. That is, in the LR cell, an access method using PDCCH (downlink control channel) that does not perform dynamic resource allocation or transmission instruction may be applied.

  In the LR cell, the terminal device transmits the HARQ-ACK and / or CSI feedback corresponding to the downlink resource (signal, channel) to the same based on the function (performance, capability) of the terminal device and the setting from the base station device. This may be performed using uplink resources (signals, channels) mapped to subframes. In this subframe, the reference resource related to CSI for the CSI measurement result in a certain subframe may be the CRS or CSI-RS of the same subframe. Such a subframe may be referred to as a self-contained subframe.

  Note that the self-contained subframe may be configured by more than one continuous subframe. That is, the self-contained subframe may be composed of a plurality of subframes, or may be one transmission burst composed of a plurality of subframes. The last subframe that constitutes the self-contained subframe (the subsequent subframe including the last one) is preferably an uplink subframe or a special subframe. That is, it is preferable that the uplink signal / uplink channel is transmitted in the last subframe.

  When a self-contained subframe is composed of a plurality of downlink subframes and one uplink subframe or special subframe, HARQ-ACK for each of the plurality of downlink subframes is the one uplink subframe. It may be transmitted in UpPTS of a link subframe or a special subframe.

  The communication device including the terminal device and the base station device may determine ACK or NACK for the signal based on whether the signal has been received (demodulated / decoded) and feed back the information. ACK indicates that the signal could be received by the communication device, and NACK indicates that the signal could not be received by the communication device. The communication device to which the NACK has been fed back may retransmit a signal that is a NACK. The terminal device determines whether to retransmit the PUSCH based on the content of the HARQ-ACK for the PUSCH transmitted from the base station device. The base station apparatus determines whether to retransmit the PDSCH based on the contents of HARQ-ACK for the PDSCH or PDCCH / EPDCCH transmitted from the terminal apparatus. The ACK / NACK for the PUSCH transmitted by the terminal device is fed back to the terminal device using the PDCCH or PHICH. The ACK / NACK for PDSCH or PDCCH / EPDCCH transmitted by the base station device is fed back to the base station device using PUCCH or PUSCH.

  In this embodiment, the subframe indicates a transmission unit and / or a reception unit of the base station device and / or the terminal device.

  In the base station device, the terminal device is an LR (Latency Reduction) device and / or an sTTI device based on an LCID (Logical Channel ID) for a CCCH (Common Control Channel) and capability information (performance information, function information) of the terminal device. May be determined.

  If the terminal device and / or the base station device supports the LR capability, the processing time (processing delay, latency) is based on the length (number of symbols) of the TTI used for the received signal and / or the transmitted signal. May be determined. That is, the processing time of the terminal device and / or the base station device supporting the LR capability may be variable based on the TTI length for the received signal and / or the transmitted signal.

  The capability information on the LR may be information indicating the number of symbols or the minimum number of symbols included in the sTTI supported by the terminal device. The capability information on the LR may be information indicating whether or not the terminal device supports a predetermined number of symbols included in the sTTI. In addition, the capability information on the LR may be information indicating whether the terminal device supports reduction of the processing time. Further, the capability information on the LR may be information indicating how much processing time can be reduced during the sTTI operation. In other words, the capability information on the LR may be information indicating the width of the reduction of the processing time or the minimum value / maximum value. Also, the capability information on the LR may be defined for each of the downlink and the uplink.

  S1 signaling has been extended to include terminal radio capability information for paging. When the paging-specific capability information is provided to the MME (Mobility Management Entity) by the base station apparatus, the paging request from the MME instructs the base station apparatus to inform the base station apparatus of information on a terminal apparatus capable of sTTI operation. May use this information. The identifier may be referred to as an ID (Identity, Identifier).

Terminal device capability information (UE radio access capability, UE
The EUTRA capability starts a procedure for a terminal device in a connection mode (that is, a terminal device in which an RRC connection is established) when the base station device (EUTRAN) needs the capability information of the terminal device. The base station device inquires about the capability information of the terminal device. The terminal device transmits the capability information of the terminal device in response to the inquiry. The base station device determines whether or not the terminal device supports the capability information, and if so, transmits the setting information corresponding to the capability information to the terminal device using upper layer signaling or the like. When the setting information corresponding to the capability information is set, the terminal device determines that transmission / reception based on the capability is possible.

  The parameter related to the setting of the physical channel and / or the physical signal may be set in the terminal device via the upper layer signaling as an upper layer parameter. Further, some parameters related to the setting of the physical channel and / or the physical signal may be set in the terminal device via L1 signaling (physical layer signaling, for example, PDCCH / EPDCCH) such as a DCI format or a grant. In addition, default settings or default values of parameters related to the setting of the physical channel and / or the physical signal may be set in the terminal device in advance. In addition, the terminal device may update the default value when notified of parameters related to the settings using higher layer signaling. Further, the type of higher layer signaling / message used for notifying the setting may be different depending on the corresponding setting. For example, the upper layer signaling / message may include an RRC message, broadcast information, system information, and the like.

  When transmitting a DS on the LAA frequency, the base station apparatus may map data information and / or control information in the DS occasion. The data information and / or control information may include information on the LAA cell. For example, the data information and / or control information may include the frequency to which the LAA cell belongs, cell ID, load and congestion status, interference / transmission power, channel occupation time, and buffer status related to transmission data.

  When the DS is measured at the LAA frequency, resources used for each signal included in the DS may be extended. For example, the CRS may use resources corresponding to the antenna ports 2 and 3 as well as the antenna port 0. Also, for the CSI-RS, resources corresponding to the antenna ports 16 and 17 as well as the antenna port 15 may be used.

  In the LR cell, when resources related to DS are set in the terminal device using a higher layer signal (RRC signaling) or system information, L1 signaling (control information corresponding to a certain field included in the PDCCH or DCI format) And L2 signaling (control information corresponding to MAC CE), that is, a terminal device is dynamically instructed whether or not to receive a DS using a lower layer signal (a signal in a layer lower than the RRC layer). Is also good.

  In the LR cell, the RS for demodulation / decoding and the RS for CSI measurement may be common resources, or may be different resources if individually defined.

  Next, a cell search according to the present embodiment will be described.

  In LTE, cell search is a procedure for performing time-frequency synchronization of a terminal device and detecting a cell ID of the cell. EUTRA cell search supports the entire scalable transmission bandwidth for more than 72 subcarriers. The EUTRA cell search is performed on the downlink based on the PSS and the SSS. The PSS and the SSS are transmitted using 72 subcarriers at the center of the bandwidth of the first subframe and the sixth subframe of each radio frame. The adjacent cell search is performed based on the same downlink signal as the initial cell search.

  When communication is performed in a stand-alone type in the LR, a cell search similar to the above may be performed.

  Next, measurement of the physical layer according to the present embodiment will be described.

  In LTE, physical layer measurements include intra-frequency and inter-frequency measurements in EUTRAN (RSRP / RSRQ), terminal device reception and transmission time differences, and reference signal time differences used for terminal device positioning (RSTD). , RAT (EUTRAN-GERAN / UTRAN), and measurement between systems (EUTRAN-non-3GPP RAT). The measurement of the physical layer is performed to support mobility. The EUTRAN measurement includes a measurement performed by a terminal device in an idle mode and a measurement performed by a terminal device in a connection mode. The terminal device performs EUTRAN measurement in an appropriate measurement gap, and is synchronized with the cell that has performed EUTRAN measurement. Note that these measurements are performed by the terminal device, and thus may be referred to as measurement of the terminal device.

  The terminal device may support at least two physical quantities (RSRP, RSRQ) for the measurement in EUTRAN. Further, the terminal device may support a physical quantity related to RSSI. The terminal device may perform the corresponding measurement based on the parameter related to the physical quantity set as the upper layer parameter.

  Physical layer measurements are made to support mobility. For example, intra-frequency and inter-frequency measurements in EUTRAN (RSRP / RSRQ), a time difference between reception and transmission of a terminal device, a measurement of a reference signal time difference used for positioning of a terminal device (RSTD), and an inter-RAT (EUTRAN) -GERAN / UTRAN) and measurements between systems (EUTRAN-non-3GPP RAT). For example, physical layer measurements include measurements for intra and inter frequency handovers, measurements for inter-RAT handovers, timing measurements, measurements for RRM, and measurements for positioning if positioning is supported. The measurement for the inter-RAT handover is defined in GSM (registered trademark), UTRA FDD, UTRA TDD, CDMA2000, 1xRTT, CDMA2000 HRPD, and support for handover to IEEE 802.11. EUTRAN measurements are also used to support mobility. The EUTRAN measurement includes a measurement performed by a terminal device in an idle mode and a measurement performed by a terminal device in a connection mode. For example, RSRP or RSRQ may be measured for each of the intra and inter frequencies, regardless of whether the terminal device is in the idle mode or the connection mode. The terminal device performs EUTRAN measurement in an appropriate measurement gap, and is synchronized with the cell that has performed EUTRAN measurement.

  The measurement of the physical layer includes that the radio characteristics are measured by the terminal device and the base station device and are reported to an upper layer of the network.

  Next, details of the DCI format according to the present embodiment will be described.

  The DCI format may be defined according to the configuration, combination, and use of the transmitted DCI.

  DCI format 0 is used for PUSCH scheduling in one uplink cell (ie, serving cell).

  DCI format 0A is used for PUSCH scheduling in one LAA secondary cell.

  The DCI format 0B is used for PUSCH scheduling in each of a plurality of subframes in one LAA secondary cell.

  DCI format 1 is used for scheduling one PDSCH codeword in one cell.

  DCI format 1A is used for random access procedures initiated by compact scheduling and / or PDCCH order of one PDSCH codeword in one cell. The DCI corresponding to the PDCCH order may be transmitted on PDCCH or EPDCCH.

  DCI format 1B is used for compact scheduling of one PDSCH codeword in one cell with precoding information.

  DCI format 1C is used for very compact scheduling of one PDSCH codeword, MCCH change notification, SC-MCCH change notification, TDD reconfiguration (reconfiguration of TDD UL / DL configuration), and LAA shared information.

  DCI format 1D is used for very compact scheduling of one PDSCH codeword in one cell with precoding and power offset information.

  DCI format 2 / 2A / 2B / 2C / 2D is a DCI format related to downlink transmission.

  DCI format 3 is used for transmission of a TPC command for PUCCH and / or PUSCH accompanied by power adjustment in two bits (that is, a TPC command capable of four types of power adjustment / power correction).

  DCI format 3A is used for transmission of a TPC command for PUCCH and / or PUSCH with 1-bit power adjustment (that is, a TPC command that can perform two types of power adjustment / power correction).

  DCI format 4 is used for PUSCH scheduling in one uplink cell with multiple antenna port transmission modes.

  DCI format 4A is used for PUSCH scheduling in one LAA cell with multiple antenna port transmission modes.

  DCI format 4B is used for scheduling of PUSCH with multiple antenna port transmission modes in each of multiple subframes of one LAA cell.

  Here, various DCI formats used for sTTI transmission are referred to as DCI formats X / Y / Z.

  DCI format X is used for sPUSCH scheduling in one cell (one LR cell).

  DCI format Y is used for sPDSCH scheduling in one cell (one LR cell).

  The format size or payload size for DCI format X and DCI format Y may be the same size. At that time, the DCI format X and the DCI format Y may be switched based on one field in order to reduce the number of blind detections.

  DCI format Z is used for transmission of a TPC command for sPUCCH and / or sPUSCH with power adjustment of a predetermined bit (that is, a TPC command capable of performing power adjustment / power correction of a type corresponding to a predetermined bit). .

  In the DCI format 0/4/3 / 3A, when the TPC command for the sPUSCH is included, the number of bits configuring the TPC command for the sPUSCH may be larger than the number of bits configuring the TPC command for the PUSCH. That is, the correction value obtained by the TPC command for the sPUSCH may be set to a larger value than the correction value obtained by the TPC command for the PUSCH. Further, the correction value obtained by the TPC command for sPUSCH may be settable to a smaller value than the correction value obtained by the TPC command for PUSCH. That is, the correction value obtained by the TPC command for the sPUSCH may be set in a wider range and in multiple stages than the correction value obtained by the TPC command for the PUSCH.

  The DCI / DCI format used for sPDSCH / sPUSCH scheduling and power adjustment may be referred to as an sDCI / sDCI format.

  For transmission of DCI, RNTI assigned by the base station apparatus to the terminal apparatus may be used. Specifically, CRC parity bits may be added to the DCI format (which may be downlink control information), and after the addition, the CRC parity bits may be scrambled by RNTI. Here, the CRC parity bits added to the DCI format may be obtained from the payload of the DCI format. Note that DCI transmission may include transmission in DCI format and transmission on PDCCH.

Here, in the present embodiment, “CRC parity bit”, “CRC bit”, and “CRC” may be the same. Also, “PDCCH to which the DCI format with the CRC parity bit added is transmitted”, “PDCCH including the CRC parity bit and including the DCI format”, “PDCCH including the CRC parity bit”, and “the DCI format “Including PDCCH” may be the same. “PDCCH including X” and “PDCCH including X” may be the same. The terminal device may monitor the DCI format. Further, the terminal device may monitor DCI. Further, the terminal device may monitor the PDCCH.

  The terminal device attempts to decode the DCI format to which the CRC parity bit scrambled by the RNTI is added, and detects the DCI format for which the CRC has succeeded as the DCI format addressed to the terminal device (also referred to as blind decoding). ). That is, the terminal device may detect the PDCCH with the CRC scrambled by the RNTI. Further, the terminal device may detect a PDCCH with a DCI format to which a CRC parity bit scrambled by RNTI is added. That is, a CRC may be added for error detection of DCI transmission. The CRC added to the DCI transmission may be scrambled with the corresponding RNTI or mask.

  Here, the RNTI may include a C-RNTI (Cell-Radio Network Temporary Identifier). For example, the C-RNTI may be a unique identifier for the terminal device used for RRC connection and scheduling identification. Also, C-RNTI may be used for dynamically scheduled unicast transmissions. That is, the C-RNTI may be used to identify a terminal device.

  The RNTI may include an SPS C-RNTI (Semi-Persistent Scheduling C-RNTI). For example, the SPS C-RNTI is a unique identifier for the terminal device used for semi-persistent scheduling. Also, the SPS C-RNTI may be used for semi-persistently scheduled unicast transmission. Here, the transmission semi-persistently scheduled may include the meaning of transmission scheduled periodically.

  Further, the RNTI may include RA-RNTI (Random Access-RNTI). For example, RA-RNTI may be an identifier used for transmission of a random access response message. That is, RA-RNTI may be used for transmission of a random access response message in a random access procedure. For example, when transmitting the random access preamble, the terminal device may monitor the PDCCH with the CRC scrambled by RA-RNTI. Further, the terminal device may receive a random access response on the PDSCH based on detection of a PDCCH accompanied by a CRC scrambled by the RA-RNTI.

  Here, the PDCCH with CRC scrambled by C-RNTI may be transmitted in USS or CSS. Also, the PDCCH with the CRC scrambled by the SPS C-RNTI may be transmitted in USS or CSS. Also, the PDCCH with the CRC scrambled by RA-RNTI may be transmitted only in the CSS.

  The RNTI that scrambles the CRC includes RA-RNTI, C-RNTI, SPS C-RNTI, temporary C-RNTI, eIMTA-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI, M-RNTI, P-RNTI, There is SI-RNTI.

  RA-RNTI, C-RNTI, SPS C-RNTI, eIMTA-RNTI, TPC-PUCCH-RNTI, and TPC-PUSCH-RNTI are set in the terminal device via higher layer signaling.

  M-RNTI, P-RNTI, and SI-RNTI correspond to one value. For example, P-RNTI corresponds to PCH and PCCH, and is used for notifying a change in paging and system information. SI-RNTI corresponds to DL-SCH and BCCH, and is used for reporting system information. RA-RNTI corresponds to DL-SCH and is used for a random access response.

  RA-RNTI, C-RNTI, SPS C-RNTI, temporary C-RNTI, eIMTA-RNTI, TPC-PUCCH-RNTI, and TPC-PUSCH-RNTI are set using upper layer signaling.

  TPC-sPUCCH-RNTI and / or TPC-sPUSCH-RNTI may be set using higher layer signaling for a terminal device that performs sTTI transmission.

  Predetermined values may be defined for the M-RNTI, the P-RNTI, the SI-RNTI, and the CC-RNTI.

  A PDCCH with a CRC scrambled by each RNTI may have a different transport channel or logical channel depending on the value of the RNTI. That is, the indicated information may differ depending on the value of the RNTI.

  One SI-RNTI is used to address SIB1 as well as all SI messages.

  SI-RNTI is used to address system information in DCI format 1A and / or 1C.

  The RA-RNTI is used in DCI format 1A and / or 1C to address information about a random access procedure initiated by PDCCH order.

  The P-RNTI is used to address paging information in DCI format 1A and / or 1C.

  The M-RNTI is used to address multicast information.

  TPC-PUSCH-RNTI is used in DCI format 3 / 3A to address information about a TPC command for PUSCH.

  TPC-PUCCH-RNTI is used in DCI format 3 / 3A to address information about a TPC command for PUCCH.

  TPC-sPUSCH-RNTI is used in DCI format 3 / 3A / Z to address information on TPC commands for sPUSCH.

TPC-sPUCCH-RNTI is sPC in DCI format 3 / 3A / Z.
Used to address information about TPC commands for the UCCH.

  CC-RNTI is used to address LAA shared information in DCI format 1C.

  Here, the DCI format related to downlink transmission (eg, transmission of PDSCH and / or sPDSCH) may be referred to as downlink grant or downlink assignment. Also, a DCI format associated with uplink transmission (eg, transmission of PUSCH and / or sPUSCH and / or SRS) may be referred to as an uplink grant and / or an uplink assignment. The downlink grant may be called a DL grant, and the uplink grant may be called an UL grant.

  In the present embodiment, a DCI format / uplink grant related to PUSCH transmission / scheduling is referred to as a first uplink grant, and a DCI format / uplink grant related to sPUSCH transmission / scheduling is referred to as a second uplink grant. .

  For example, the first uplink grant may include a carrier indicator field (CIF). Also, the first uplink grant may include information on a TPC command for the PUSCH to be scheduled. Further, the first uplink grant may include information on a cyclic shift with respect to DMRS (DMRS related to PUSCH transmission). In addition, the first uplink grant may include information on a modulation and coding scheme (MCS) and / or information on a redundancy version. Also, the first uplink grant may include information on resource block allocation and / or information on hopping resource allocation. Also, the first uplink grant may include information (CSI request) used to request transmission of CSI. Further, the first uplink grant may include information (SRS request) used for requesting SRS transmission.

  Here, the uplink grant may be defined as DCI common to a plurality of terminal devices and / or DCI dedicated to a certain terminal device. That is, the uplink grant may be transmitted in CSS and / or USS and / or UEG-SS. Also, the uplink grant may be transmitted on the PDCCH and / or the EPDCCH. Further, the CRC parity bit added to the uplink grant may be scrambled by a predetermined RNTI or a predetermined value RNTI.

  In addition, the uplink grant may be used to define a setting for a certain subframe. That is, the uplink grant may be used to indicate a setting commonly used in one certain subframe. That is, the setting indicated by using the uplink grant may be valid for each subframe. That is, the uplink grant may be a subframe-specific uplink grant. That is, when the PUSCH is scheduled using the uplink grant, the terminal device may perform transmission on the scheduled PUSCH or sPUSCH in a certain subframe (using all the certain subframes).

In addition, as an uplink grant, at least information related to allocation of frequency resources to PUSCH, sPUSCH, and / or sPDCCH (for example, information related to allocation of physical resource blocks to PUSCH, sPUSCH, and / or sPDCCH) May be defined. Such a DCI format may be referred to as a second uplink grant. The second uplink grant may be used at least for PUSCH, sPUSCH, and / or sPDCCH scheduling.

  For example, the second uplink grant may include bandwidth-related information for the scheduled PUSCH, the scheduled sPUSCH, and / or the scheduled sPDCCH. That is, the second uplink grant may include information related to the scheduled bandwidth for transmission on the PUSCH, transmission on the sPUSCH, and / or transmission on the sPDCCH.

  For example, the second uplink grant includes a start position (and / or an end position of a physical resource block for a scheduled PUSCH, a scheduled sPUSCH, and / or a scheduled sPDCCH from the start position, for example, from the start position). Information related to the length or the number of resource blocks) may be included. Also, the second uplink grant may include information for indicating a physical resource block for a scheduled PUSCH, a scheduled sPUSCH, and a scheduled sPDCCH.

  Here, the second uplink grant may include CIF. Also, the second uplink grant may include information on a TPC command for the PUSCH to be scheduled. Further, the second uplink grant may include information on a TPC command for the scheduled sPUSCH. In addition, the second uplink grant may include information on a cyclic shift for a DMRS (a PUSCH and / or a DMRS related to sPUSCH transmission). Further, the second uplink grant may include information on the MCS and / or information on the redundancy version. In addition, the second uplink grant may include information on resource block allocation and / or information on hopping resource allocation. Also, the second uplink grant may include a CSI request. Also, the second uplink grant may include an SRS request.

  Here, the information (part or all of the information) transmitted using the second uplink grant is a signal of an upper layer (for example, a signal in the MAC layer and / or a signal in the RRC layer). May be transmitted. Hereinafter, it is described that the above-described downlink control information is transmitted using the second uplink grant, but the downlink control information transmitted using the second uplink grant is transmitted in the upper layer. May be transmitted using this signal.

  Here, the second uplink grant may be defined as a DCI or an uplink grant common to a plurality of terminal devices. That is, the second uplink grant may be transmitted in CSS or UEG-SS. Further, the second uplink grant may be transmitted only on the PDCCH and / or the EPDCCH. That is, the second uplink grant may be transmitted in a specific search space of a specific physical channel.

Also, the CRC parity bit added to the second uplink grant may be scrambled by a specific RNTI. For example, the specific RNTI may be an RNTI that is set separately from the C-RNTI. Further, the specific RNTI may be an RNTI set as an upper layer parameter. Here, the CRC parity bit added to the second uplink grant may be scrambled by the first UL-RNTI. Further, the search space in which the second uplink grant is transmitted is at least the first space.
UL-RNTI.

  Also, the second uplink grant may be used to define settings for a certain subframe. That is, the second uplink grant may be used to indicate a setting commonly used in one certain subframe. That is, the setting indicated using the second uplink grant may be valid for one or a plurality of subframes. That is, the second uplink grant may be a subframe-specific uplink grant. That is, when the PUSCH is scheduled using the second uplink grant, the terminal device performs transmission on the scheduled PUSCH in a certain subframe (or using all of the certain subframes). Is also good.

  Also, a DCI format including at least information on allocation of time resources to PUSCH and / or sPUSCH may be defined as an uplink grant. Such a DCI format may be referred to as a third uplink grant. For example, the third uplink grant may include information related to allocation of a transmission time interval (TTI) for transmission on the PUSCH and / or sPUSCH. Note that the information on the time length of the TTI may be a concession indicating the number of symbols used for transmission. That is, the third uplink grant may be used at least for PUSCH and / or sPUSCH scheduling.

  For example, the third uplink grant may include information related to the PUSCH to be scheduled and / or the TTI length for the scheduled sPUSCH. Further, the third uplink grant may include information related to the position of the DMRS transmitted together with the scheduled PUSCH. Also, the third uplink grant may include information related to the location of the DMRS transmitted with the scheduled sPUSCH.

  Further, the third uplink grant may include information on DMRS transmitted with the PUSCH to be scheduled (for example, information on cyclic shift of DMRS). Further, the third uplink grant may include information on DMRS transmitted with the scheduled sPUSCH (eg, information on cyclic shift of DMRS). Further, the third uplink grant may include information on delay or time offset for transmission on the PUSCH and / or transmission on the sPUSCH based on reception (detection) of the third uplink grant.

  Here, the third uplink grant may include CIF. Further, the third uplink grant may include information on a TPC command for the PUSCH to be scheduled. Further, the third uplink grant may include information on a TPC command for the scheduled sPUSCH. In addition, the third uplink grant may include information on the cyclic shift for the DMRS (that is, the DMRS related to the transmission of the PUSCH and / or the sPUSCH). Further, the third uplink grant may include information on the MCS and / or information on the redundancy version. In addition, the third UL grant may include information on resource block allocation and / or information on hopping resource allocation. Also, the third uplink grant may include a CSI request. Also, the third uplink grant may include an SRS request. Further, the third uplink grant may include information on the TTI index.

  Here, the third uplink grant may be defined as DCI dedicated to a certain terminal device. That is, the third uplink grant may be transmitted in the USS. Further, the third uplink grant may be transmitted on the PDCCH, the EPDCCH, and / or the sPDCCH. Further, the third uplink grant may be transmitted on the PDSCH.

  Further, the CRC parity bit added to the third uplink grant may be scrambled by a specific RNTI. Here, the CRC parity bit added to the third uplink grant may be scrambled by the third UL-RNTI. Further, the search space in which the third uplink grant is transmitted may be provided at least by the second UL-RNTI.

  Further, the third uplink grant may be used to define a setting for a certain TTI. That is, the third uplink grant may be used to indicate a setting used in one certain TTI. That is, the setting indicated using the third uplink grant may be valid for one TTI. That is, the third uplink grant may be a TTI-specific uplink grant. That is, when the PUSCH is scheduled using the third uplink grant, the terminal apparatus performs transmission on the scheduled PUSCH in a certain TTI (that is, in a certain TTI in a certain subframe). Is also good. Note that one certain TTI may be one certain sTTI. Further, one sTTI may be an sTTI in one subframe.

  Here, as described above, the second uplink grant may be used for scheduling the sPDCCH in which the third uplink grant is transmitted. For example, the terminal device may receive (detect) the third uplink grant by receiving (detecting) the second uplink grant. In addition, the terminal device monitors (decodes and detects) the PDCCH and / or the EPDCCH on which the second uplink grant is transmitted, so that the PDCCH, the EPDCCH and / or the sPDCCH on which the third uplink grant is transmitted. It may be monitored. Note that monitoring may include decoding and / or detecting certain physical channels or information transmitted over certain physical channels.

  Here, the PDCCH and / or EPDCCH on which the second uplink grant is transmitted is detected by monitoring by the terminal device 1, and the resources of the PDCCH, EPDCCH and / or sPDCCH on which the third uplink grant is transmitted are as follows: It may be directly instructed by information included in the second uplink grant. Here, the PDCCH, EPDCCH, and / or sPDCCH resources may include time resources and / or frequency resources. That is, the PDCCH, EPDCCH, and / or sPDCCH on which the third uplink grant is transmitted may not be monitored by the terminal device.

  Hereinafter, the uplink grant (DCI format) may include a first uplink grant, a second uplink grant, and / or a third uplink grant.

Here, when the PDSCH resource is scheduled using the downlink grant, the terminal device may receive the downlink data (DL-SCH) on the PDSCH based on the scheduling. Also, when a PUSCH resource is scheduled using an uplink grant, the terminal device transmits uplink data (UL-SCH) and / or uplink control information (UCI) using the PUSCH based on the scheduling. May be sent. Further, when the sPUSCH resource is scheduled using the uplink grant, the terminal device may transmit the uplink data and / or the uplink control information on the sPUSCH based on the scheduling.

  In the present embodiment, a DCI format / downlink grant related to PDSCH transmission / scheduling is referred to as a first downlink grant, and a DCI format / downlink grant related to sPDSCH transmission / scheduling is referred to as a second downlink grant. .

  For example, the first downlink grant may include a CIF. Further, the first downlink grant may include information on a TPC command for the PUCCH used for transmitting the HARK-ACK of the PDSCH to be scheduled. Further, the first downlink grant may include information on the HARQ process number. Further, the first downlink grant may include information on the MCS and / or information on the redundancy version. Further, the first downlink grant may include information on resource block allocation and / or information indicating whether the allocation is centralized or distributed. Also, the first downlink grant may include an SRS request.

  For example, the second downlink grant may include information related to the scheduled PDSCH, the scheduled sPDSCH, and / or the bandwidth for the scheduled sPDCCH. That is, the second downlink grant may include information related to the scheduled bandwidth for transmission on the PDSCH, transmission on the sPDSCH, and / or transmission on the sPDCCH.

  The number of bits used for the SRS request and / or CSI request may be determined based on the type of DCI format in which the SRS request and / or CSI request is included.

  Next, a processing time (latency) of the terminal device and / or the base station device according to the present embodiment will be described.

  In the present embodiment, “the CP is added to the OFDM symbol and / or the SC-FDMA symbol” means that “the sequence of the CP is added to the sequence of the physical channel transmitted in the OFDM symbol and / or the SC-FDMA symbol. ”.

  The processing time may be determined based on the time required for receiving and decoding the detected signal and the time required for generating (modulating or encoding) the signal to be transmitted. By reducing the TTI length of the received signal and the TTI length of the transmitted signal, the terminal device and the base station device can shorten the time required for decoding and the time required for generation accordingly. The processing time may include time adjustment based on a timing advance, a synchronization signal, and a duplex mode.

In the present embodiment, when the terminal device supports transmission and / or reception using sTTI (that is, sTTI operation), the terminal device transmits the OFDM symbol and / or the SC-ID for some physical channels. The processing time in a TTI composed of 14 symbols obtained by adding an NCP to an FDMA symbol may be reduced. Whether the processing time related to the TTI can be shortened may be set via higher layer signaling from the base station apparatus. That is, when the base station device determines that the terminal device in the cell has the capability to support sTTI based on the capability information transmitted from the terminal device, the base station device transmits and / or receives the TTI and / or sTTI. May be set so as to shorten the processing time for. It should be noted that the terminal device may be supported for the ability to shorten the processing time separately for transmission and reception. In addition, the terminal device may indicate whether or not the capability for reducing the processing time is supported for each of the processing time for transmission and the processing time for reception. In addition, the processing related to transmission and the processing related to consultation may be referred to as processing related to the uplink and processing related to the downlink, respectively. Note that the time adjustment based on the timing advance may be limited by shortening the processing time.

  Whether the processing time is dynamically changed for each TTI length of the physical channel or reduced based on upper layer parameters may be set by the base station apparatus via upper layer signaling.

  Here, “the terminal device supports transmission using sTTI” is synonymous with that the terminal device supports transmission on at least one physical channel among sPUSCH, sPUCCH, and sPRACH. Further, “a terminal device supports reception using sTTI” has the same meaning as that it supports reception for at least one physical channel among sPDSCH and sPDCCH.

  The sTTI may indicate whether it is supported for each physical channel. The terminal device may indicate, using the capability information, whether transmission and / or reception using sTTI is supported for each physical channel. The base station apparatus may perform sTTI-related settings for the terminal apparatus via higher layer signaling based on the capability information.

  Next, transmission power control of the PUSCH according to the present embodiment will be described.

When the terminal device simultaneously transmits the PUSCH without the PUCCH to the serving cell c, the transmission power P _{PUSCH, c} (i) of the terminal device for the PUSCH transmission in the subframe i of the serving cell c is given by Expression (1). You may be.

When the terminal device simultaneously transmits the PUSCH with the PUCCH to the serving cell c, the transmission power P _{PUSCH, c} (i) of the terminal device for the PUSCH transmission in the subframe i of the serving cell c is given by Expression (2). You may.

When the terminal device does not transmit the PUSCH for the serving cell c, the terminal device transmits the PUSCH in the subframe i of the serving cell c for the accumulation of the TPC command received with the DCI format 3 / 3A for the PUSCH. Assume that the power P _{PUSCH, c} (i) has been calculated by equation (3).

Here, P _{CMAX, c} (i) is the transmission power of the terminal device set in subframe i for serving cell c. Parameters (variables, arguments) with “＾” at the top are the linear values of the corresponding parameters.

In a case where the terminal device transmits the PUCCH without transmitting the PUSCH in the subframe i for the serving cell c, the terminal device transmits the PUCCH received along with the DCI format 3 / 3A for the PUSCH to the sub-cell of the serving cell c. assume transmit power _{P PUCCH} for the terminal device for PUCCH transmission in frame _{i, P CMAX} obtained for c _(i), c and (i).

When the terminal device does not transmit the PUCCH and the PUSCH in the subframe i for the serving cell c, the terminal device obtains MPR = 0 dB and A-MPR for the accumulation of the TPC command received together with the DCI format 3 / 3A for the PUSCH. = 0 dB, P-MPR = 0 dB, ΔT _c = 0 dB, and calculate P _{CMAX, c} (i).

  Here, the MPR (Maximum Power Reduction) is an adjustment value based on various conditions for the maximum transmission power / maximum output power of the terminal device. The MPR may be determined based on a channel bandwidth and / or a transmission bandwidth and a modulation scheme (such as QPSK or 16QAM) set in the terminal device. For PRACH, PUCCH, and SRS transmission, MPR for PUSCH QPSK is applied. For each subframe, the MPR is estimated on a slot-by-slot basis and is given by the maximum value taken over in the transmission of the slot. The maximum value is the larger of the estimated values of the two slots in the same subframe. That is, the larger value of the two slots is applied to the subframe. In other words, the MPR is estimated for each slot, and the larger value among the slots included in the subframe is applied to the subframe. For non-contiguous resource allocation transmissions on one component carrier, the MPR for maximum transmit power / maximum output power is the transmit bandwidth setting and the total number of simultaneously transmitted resource blocks of channel bandwidth or aggregated bandwidth. May be defined in association with.

A-MPR is based on additional requirements (CA and MIMO (Multiple Input).
It is an MPR corresponding to Multiple Output (DC) and Dual Connectivity (DC). For example, it corresponds to an additional requirement condition of an ACLR (Adjustable Channel Leakage Ratio) or spectrum emission. Those requirements may be signaled by the network. That is, the A-MPR may be defined based on the value of the network signaling. Further, the A-MPR may be determined based on the bandwidth of the component carrier, the arrangement position (frequency position, frequency domain) of the resource block, and the modulation scheme. That is, even for the same component carrier, the value of A-MPR may be independently defined depending on the frequency domain. For example, the value of A-MPR may be different between the center and the end of the bandwidth.

  Note that CA is a method of performing communication by aggregating a plurality of component carriers (serving cells). A CA that aggregates component carriers of different frequencies belonging to the same operating band (that is, a carrier frequency or a center frequency) is referred to as an intraband CA. A CA that aggregates component carriers of different operating bands is called an inter-band CA.

  Note that MIMO is a method of performing communication using a plurality of antennas (antenna ports).

  For example, the A-MPR corresponding to the value of network signaling and the A-MPR corresponding to the subcarrier interval may be set independently.

  MPR and A-MPR may be defined for the serving cell. That is, the MPR and the A-MPR may be set for each serving cell.

When performing inter-band CA, an allowable value _{ΔIB, c} may be defined for each component carrier (serving cell) that performs CA.

  P-MPR (Power Management MPR) is an MPR used to guarantee compliance, and is applied to each serving cell. For example, P-MPR is applied in consideration of electromagnetic energy absorption, unnecessary emission, and a dense area (a dense scenario) in which transmission occurs simultaneously in a plurality of RATs.

  MPR, A-MPR, and P-MPR may be defined for each serving cell. Also, MPR, A-MPR, and P-MPR may be defined for each operating band.

  The MPR, A-MPR, and P-MPR are each evaluated on a slot-by-slot basis, and the largest value is applied to a subframe (that is, among slots constituting the subframe). . That is, a value that reduces the value of the maximum output power that can be set by the terminal device (total transmission power that can be set by the terminal device) may be applied.

The maximum output power value is at least part of or all of information received from the base station device (eg, system information or an RRC message), MPR, A-MPR, P-MPR, and _{ΔIB, c.} It may be determined based on this. The maximum output power value is a value between the lower limit value of the maximum output power value and the upper limit value of the maximum output power. The lower limit of the maximum output power value is a part of information received from the base station device (for example, system information or an RRC message), MPR, A-MPR, P-MPR, and _{ΔIB, c} , or It may be determined based on at least all of them. The upper limit of the maximum output power value is information received from the base station apparatus (for example, system information or an RRC message), MPR, A-MPR, P-MPR, and a part of _{ΔIB, c} , or It may be determined based on at least all of them.

M _{PUSCH, c} (i) is the bandwidth of the PUSCH resource assignment expressed in the number of effective resource blocks for the serving cell c and the subframe i. That is, it is a parameter set by DCI.

_{PO_NOMINAL_PUSCH} and _{PO_UE_PUSCH} are set as upper layer parameters related to uplink power control. _{PO_NOMINAL_PUSCH} and _{PO_UE_PUSCH} may be set for each of the PUSCH corresponding to the semi-persistent grant, the PUSCH corresponding to the dynamic scheduled grant, and the PUSCH corresponding to the random access response grant. Furthermore, when more than one subframe set is set for uplink power control, the uplink power control subframe set 2 _{P O - NOMINAL - PUSCH} and _{P O_UE_PUSCH} corresponding to (the second subframe set) may be set additionally. In other words, the same _{PO_NOMINAL_PUSCH} and _{PO_UE_PUSCH} may be used for the PUSCH corresponding to the random access response grant even if more than one subframe set is set. Here, the uplink power control subframe set indicates a group to which subframes sharing various parameters related to uplink power control belong (ie, a subframe set). That is, different uplink power control may be performed for each subframe set.

P _{O - PUSCH, c} is the sum of _{P O - NOMINAL - PUSCH} and _{P O_UE_PUSCH} set for the serving cell c.

α _c is a compensation coefficient for the downlink path loss PL _c in the serving cell c. The value of α _c is set for each of the PUSCH corresponding to the semi-persistent grant and the PUSCH corresponding to the dynamic scheduled grant as upper layer parameters, but is used for the PUSCH corresponding to the random access response grant. In this case, the value of α _c is always 1.

PL _c is a downlink path loss evaluation value calculated in the terminal device for the serving cell c. The PL _c may be determined based on a reference signal received power (RSRP) based on an upper layer filter setting for a power value of a downlink reference signal provided by an upper layer and a reference serving cell.

  Assuming that serving cell c belongs to the TAG including the primary cell (that is, PTAG), for the uplink of the primary cell, the primary cell is a reference serving cell for determining reference signal power and RSRP filtered in an upper layer. May be used. Also, if the serving cell c belongs to the TAG including the primary cell, the uplink cell of the secondary cell (that is, the serving cell that is the secondary cell) is set by a path loss reference or an upper layer parameter indicating the link of the reference serving cell of the path loss. The serving cell thus determined may be used as a reference serving cell for determining reference signal power and RSRP filtered in an upper layer. The reference signal power is an upper layer parameter corresponding to the transmission power from the base station device. For example, the transmission power of the CRS may be based on the reference signal power.

  Assuming that serving cell c belongs to a TAG including PSCell (ie, PSTAG), for the uplink of PSCell, PSCell is used as a reference serving cell to determine reference signal power and RSRP filtered in upper layers. You may. If the serving cell c belongs to the TAG including the PSCell, the serving cell set by the upper layer parameter indicating the path of the path loss reference or the path of the reference serving cell of the path loss with respect to the uplink of the secondary cell other than the PSCell is the reference signal. It may be used as a reference serving cell for determining power and RSRP filtered in higher layers.

  Assuming that serving cell c belongs to a TAG that does not include a primary cell or a PSCell (ie, STAG), serving cell c may be used as a reference serving cell for determining reference signal power and RSRP filtered in an upper layer. . That is, the primary cell and the PSCell need not be used as the reference serving cell.

Δ _{TF, c} (i) may be given based on equation (4). K _s may be given by a parameter related to the difference of MCS given by the upper layer for each serving cell (ie, deltaMCS-enabled). K _s, it is 1.25 and 0. When the parameter is set to “enabled”, K _s = 1.25, and when the parameter is set to “disabled”, K _s = 0. Also, for transmission mode 2 for PUSCH, K _s = 0.

  BPRE (Bit Per Resource Element) is the number of CQI / PMI bits allocated to one resource element for control data transmitted by PUSCH without UL-SCH data. Note that the CQI / PMI bit may include a CRC bit. BPRE is the sum of the sizes of the code blocks allocated to one resource element in other cases.

β ^PUSCH _offset is β ^CQI _offset for control data transmitted by PUSCH without UL-SCH data, and is 1 in other cases.

β ^PUSCH _offset may be set for each of one codeword and a plurality of codewords.

β ^PUSCH _offset may be set for each of CQI, RI, and ACK.

β ^PUSCH _offset may be set for each of the PUSCH corresponding to the dynamic scheduled grant and the PUSCH corresponding to the semi-persistent grant.

beta ^PUSCH _offset the parameters (i.e., tpc-SubframeSet) relating to uplink power control sub-frame set based on, than one if the many subframe set is set, set beta ^PUSCH _offset corresponding to subframe set May be done.

beta ^PUSCH _offset, if often subframe set than one is set, for each subframe set, CQI, RI, beta ^PUSCH _offset may be set for each ACK.

beta ^PUSCH _offset, if often subframe set than one is set, for each subframe set, may be set beta ^PUSCH _offset for each grant.

beta ^PUSCH _offset, if often subframe set than one is set, for each subframe set, beta ^PUSCH _offset with respect to one code word and / or a plurality of codewords may be set.

δ _{PUSCH, c} is a correction value for the transmission power of the PUSCH referred to as the TPC command. That is, δ _{PUSCH, c} is a correction value obtained by the TPC command for PUSCH. δ _{PUSCH, c} , that is, the TPC command for _PUSCH, may be included in PDCCH / EPDCCH with DCI format 0/4. Also, the TPC command may be jointly coded with the TPC command for another terminal device in the PDCCH with the DCI format 3 / 3A in which the CRC parity bits are scrambled by the TPC-PUSCH-RNTI.

The terminal device sets parameters for uplink power control including the uplink power control subframe set for the serving cell c, and the subframe i is indicated by the uplink power control subframe set that is an upper layer parameter. If it belongs to the link power control subframe set 2 (that is, the second subframe set), the latest PUSCH power control adjustment state for the subframe i of the uplink power control subframe set 2 is f _{c, 2} ( given by i), the terminal device, the sub-frame i transmitted power _P PUSCH in _PUSCH, in order to determine the c _(i), instead of _f c _{(i), f c,} 2 (i) is used. Otherwise, i.e., if no more than one subframe set is set, or if subframe i belongs to the first uplink power control subframe set, the latest PUSCH power control adjustment state is f _c is given by (i).

If the accumulation is valid or the TPC command δ _{PUSCH, c} is based on the upper layer parameter indicating whether the accumulation is valid (ie, Accumulation-enabled), the CRC is scrambled by the temporary C-RNTI. If included in the PDCCH / EPDCCH with DCI format 0, f _c (i) and f _{c, 2} (i) may be given by equation (5) and / or equation (6).

  The power adjustment for performing the addition processing (accumulation processing) of the power control adjustment value (correction value) corresponding to the value of the TPC command, as in Expression (5) and / or Expression (6), is referred to as accumulation or TPC accumulation. You may. When the power control adjustment value (correction value) based on the TPC command is not accumulated, the power adjustment based on only the power control adjustment value (correction value) corresponding to the value of the immediately preceding TPC command is performed by TPC absolute. May be referred to.

δ _{PUSCH, c} (i-K _PUSCH ) is signaled on the PDCCH / EPDCCH with DCI format 0/4 or the PDCCH with DCI format 3 / 3A in subframe i-K _PUSCH . f _c (0) is the first value after the accumulation is reset. K _PUSCH may indicate the number of subframes. The value of K _PUSCH may be used to indicate a subframe in which a TPC command applied to PUSCH transmission in subframe i is transmitted.

The value of K _PUSCH is 4 for FDD or FDD-TDD and serving cell FS1. Note that FDD-TDD indicates a case of carrier aggregation of an FDD cell (FDD component carrier) and a TDD cell (TDD component carrier).

For TDD, if the terminal device has more than one serving cell configured and the TDD UL / DL configurations of at least two configured serving cells are not the same, or if the terminal device is configured for at least one serving cell, Assuming that the setting for eIMTA (that is, EIMTA-MainConfigServCell) is set, or for FDD-TDD and serving cell FS2, the value of K _PUSCH for TDD UL / DL setting is the uplink reference UL / DL for serving cell c. Refer to DL setting. Here, the uplink reference UL / DL setting is a TDD UL / DL setting used for setting / specifying a subframe for performing uplink transmission and a subframe for transmitting ACK / NACK for uplink transmission. The terminal device performs uplink transmission in the special subframe and the uplink subframe defined in the TDD UL / DL configuration, and performs the special subframe and the downlink subframe defined in the TDD UL / DL configuration. In the frame, downlink reception is performed.

For the TDD UL / DL settings 1 to 6, the value of K _PUSCH is given in a table corresponding to the TDD UL / DL settings described in FIG. FIG. 3 is a diagram illustrating a value of K _PUSCH corresponding to each uplink subframe of the TDD UL / DL configuration according to the present embodiment.

FIG. X2 is a diagram illustrating a value of K _PUSCH corresponding to an uplink subframe in a TDD UL / DL configuration. For example, in subframe 2 of TDD UL / DL setting 0, the value of K _PUSCH is 6. That is, power adjustment is performed on the PUSCH transmission of subframe 2 using the TPC command received in the six subframes before.

For TDD UL / DL setting 0, PUSCH transmission in subframe 2 or 7 is scheduled on PDCCH / EPDCCH in DCI format 0/4 with LSB (Least Significant Bit) of UL index set to "1". Then, the value of K _PUSCH is 7. For other PUSCH transmissions, the value of K _PUSCH is given in a table corresponding to the TDD UL / DL setting described in FIG.

  For a terminal device that does not support the serving cell c and the capability related to BL / CE (Bandwidth reduced Low complexity and / or Coverage Enhancement), the terminal device may use DCI format 0/4 or SPS C with C-RNTI of the terminal device. -Decoding of DCI format 0 for RNTI or PDCCH of DCI format 3 / 3A with TPC-PUSCH-RNTI of terminal equipment in every subframe except during DRX operation or when serving cell c is deactivated Try.

  Assuming that both the DCI format 0/4 and the DCI format 3 / 3A for the serving cell c are detected in the same subframe for a terminal device that does not support the capability related to the BL / CE, the terminal device determines the DCI format 0 The transmission power of the PUSCH is set using the TPC command provided in / 4.

A subframe in which the TPC command has not been decoded for the serving cell c, or a subframe in which DRX has occurred, or a subframe i is not an uplink subframe in TDD or FDD-TDD and the serving cell c frame structure type 2 For a frame, δ _{PUSCH, c} is 0 dB.

Assuming that the PDCCH / EPDCCH with DCI format 0 is valid as SPS activation or release PDCCH / EPDCCH, δ _{PUSCH, c} may be 0 dB.

The δ _{PUSCH, c} signaled by the PDCCH with DCI format 3 / 3A may be given by a particular table (ie, the first table or a first set in a table), It may be provided by a particular table determined by the TPC index provided by the upper layer as a layer parameter (ie, a second table or a second set within a table).

If the transmission power of the terminal device for the serving cell c has reached the maximum output power P _{CMAX, c} (i), the positive TPC command for the serving cell c is not accumulated (added). That is, a TPC command in which the transmission power of the terminal device to the serving cell c exceeds P _{CMAX, c} (i) is not applied. Similarly, if the transmission power of the terminal device has reached the minimum power, the negative TPC command is not accumulated (subtracted). That is, a TPC command that makes the transmission power of the terminal device to the serving cell c smaller than the minimum power is not applied.

Assuming that the terminal device does not have a setting (in other words, a parameter set) related to uplink power control including at least an upper layer parameter related to the uplink power control subframe set for the serving cell c, the serving cell c On the other hand, when the value of _{PO_UE_PUSCH, c} is changed or reset by the upper layer, or when the terminal device receives a random access response message for the serving cell c, the terminal device resets the accumulation based on the TPC command. I do.

Assuming that the terminal device has been configured for the serving cell c with at least the setting related to the uplink power control including the upper layer parameter related to the uplink power control subframe set _, the value of _{PO_UE_PUSCH, c} is changed by the upper layer. or when it is reset, or when the terminal device receives a random access response message to the serving cell c, the terminal device resets the accumulation corresponding to f _{c (*)} for the serving cell c.

Assuming that the terminal device has been set for the serving cell c with respect to the uplink power control including at least the upper layer parameters related to the uplink power control subframe set _, the value of _{PO_UE_PUSCH, c, 2} is set by the upper layer. Is changed or reset, the terminal device resets the accumulation corresponding to fc _{, 2} (*) for the serving cell c.

Assuming that the terminal device is set for the serving cell c with respect to the uplink power control including at least the upper layer parameters related to the uplink power control subframe set, if the subframe i is an uplink power control subframe if belonging to uplink power control sub-frame set 2 instructed by the upper layer parameter for the set, it is _{f c (i) = f c} (i-1), sub-frame i is an uplink power control sub-frame If it does not belong to the uplink power control subframe set 2 indicated by the upper layer parameters for the set, then fc _{, 2} (i) = fc _{, 2} (i-1).

  Next, sPUSCH transmission power control according to the present embodiment will be described.

When the terminal device simultaneously transmits sPUSCH without PUCCH / sPUCCH to serving cell c, the transmission power P _{sPUSCH, c} (x ) May be given by equation (7). Note that sTTIx may indicate the x-th sTTI from the beginning. Further, sTTIx may indicate the x-th sTTI in a radio frame (that is, in ten consecutive subframes). Further, sTTIx may indicate an x-th sTTI in a certain subframe.

When the terminal device simultaneously transmits sPUSCH with PUCCH / sPUSCH to serving cell c, the transmission power P _{sPUSCH, c} (x) of the terminal device for sPUSCH transmission in sTTIx of serving cell c or sTTIx of subframe i of serving cell c. May be given by equation (8).

When the terminal device does not transmit the sPUSCH for the serving cell c, for the accumulation of the TPC command received together with the DCI format 3 / 3A for the sPUSCH, the terminal device transmits the sTTIx of the serving cell c or the sTTIx of the subframe i of the serving cell c. It is assumed that the transmission power P _{sPUSCH, c} (x) of the terminal device for sPUSCH transmission has been calculated by equation (9).

M _{sPUSCH, c} (x) is the bandwidth of the sPUSCH resource assignment expressed in the number of resource blocks effective for sTTIx of serving cell c and subframe i. That is, it is a parameter set by DCI.

PO_NOMINAL_sPUSCH and _{PO_UE_sPUSCH} may be set as upper layer parameters related to uplink power control for the _sPUSCH . _{PO_NOMINAL_sPUSCH} and _{PO_UE_sPUSCH} may be set for each of the sPUSCH corresponding to the semi-persistent grant, the sPUSCH corresponding to the dynamic scheduled grant, and the sPUSCH corresponding to the random access response grant. Further, when more than one subframe set is configured for uplink power control, the uplink power control subframes are assigned to the sPUSCH corresponding to the semi-persistent grant, and set 2 _{P O_NOMINAL_sPUSCH} and _{P O_UE_sPUSCH} corresponding to (the second subframe set) may be set additionally. In other words, the same _{PO_NOMINAL_sPUSCH} and _{PO_UE_sPUSCH} may be used for the sPUSCH corresponding to the random access response grant even if more than one subframe set is set.

P _{O_sPUSCH, c} is the sum of _{P O_NOMINAL_sPUSCH} and _{P O_UE_sPUSCH} set for the serving cell c.

α _c and PL _c may be shared with the PUSCH for serving cell c. Further, α _c and PL _c may be set separately from the PUSCH for serving cell c. Whether α _c and PL _c are shared with the PUSCH for serving cell c may be determined based on certain higher layer parameters.

Δ _{TF, c} (x) may be given based on equation (10). K _s may be given by a parameter related to the difference of MCS given by the upper layer for each serving cell (ie, deltaMCS-enabled). When the parameter is set to “enabled”, K _s = 1.25, and when the parameter is set to “disabled”, K _s = 0. Also, for transmission mode 2 for sPUSCH, K _s = 0.

β ^sPUSCH _offset is β ^CQI _offset for control data transmitted by sPUSCH without UL-SCH data, and is 1 otherwise.

β ^sPUSCH _offset may be set for each of one codeword and a plurality of codewords.

β ^sPUSCH _offset may be set for each of CQI, RI, and ACK.

β ^sPUSCH _offset may be set for each of the sPUSCH corresponding to the dynamic scheduled grant and the sPUSCH corresponding to the semi-persistent grant.

β ^sPUSCH _offset is a β ^sPUSCH _offset corresponding to each of the sub-frame sets when more than one sub-frame set is set based on a parameter related to the uplink power control sub-frame set (that is, tpc-SubframeSet). May be set.

^β sPUSCH _offset, if often subframe set than one is set, for each subframe set, CQI, RI, ^β sPUSCH _offset may be set for each ACK.

^β sPUSCH _offset, if often subframe set than one is set, for each subframe set, may be set ^β sPUSCH _offset for each grant.

^β sPUSCH _offset, if often subframe set than one is set, for each subframe set, ^β sPUSCH _offset with respect to one code word and / or a plurality of codewords may be set.

δ _{sPUSCH, c} is a correction value for the transmission power of the sPUSCH referred to as the TPC command. δ _{sPUSCH, c} is a correction value obtained by a TPC command for sPUSCH. δ _{sPUSCH, c} , ie, the TPC command for sPUSCH, may be included in PDCCH / EPDCCH / sPDCCH with DCI format 0/4 / X. Also, the TPC command may be jointly coded with the TPC command for another terminal device in the PDCCH / sPDCCH accompanied by the DCI format 3 / 3A / Z in which the CRC parity bits are scrambled by the TPC-sPUSCH-RNTI.

The terminal device sets a parameter related to uplink power control including an uplink power control subframe set for the serving cell c, and a subframe i including sTTIx is set according to an uplink power control subframe set that is an upper layer parameter. Assuming that it belongs to the indicated uplink power control subframe set 2 (ie, the second subframe set), the latest sPUSCH power control adjustment state for sTTIx of subframe i of uplink power control subframe set 2 is , F _{c, 2} (x), and the terminal device uses f _c instead of f _c (x) to determine the transmission power P _{PUSCH, c} (x) of the sPUSCH in sTTIx of subframe i. _{, 2} (x). In other cases, for example, when parameters related to uplink power control including the uplink power control subframe set are not set, or when more than one uplink power control subframe set is not set, or If sTTIx of i belongs to the first uplink power control subframe set, the latest sPUSCH power control adjustment state is given by f _c (x).

Based on the upper layer parameter indicating whether the accumulation is valid (ie, Accumulation-enabled), if the accumulation is valid, or if the TPC command δ _{sPUSCH, c} is used, the CRC is scrambled by the temporary C-RNTI. if included in the PDCCH / EPDCCH / SPDCCH with DCI format _{0, f} c (x) and _{f c,} 2 (x) may be given by equation (11) and / or formula (12). The accumulation-enabled may be shared with the PUSCH. Further, the accumulation-enabled may be set individually for the sPUSCH and the PUSCH.

δ _{sPUSCH, c} (x−K _sPUSCH ) is a signal on PDCCH / EPDCCH / sPDCCH with DCI format 0/4 / X or PDCCH / sPDCCH with DCI format 3 / 3A / Z in sTTI (x−K _sPUSCH ). Is done. f _c (0) is the first value after the accumulation is reset.

The value of K _sPUSCH may be 4 or a predetermined value for FDD or FDD-TDD and serving cell FS1.

For TDD, if the terminal device has more than one serving cell configured and the TDD UL / DL configurations of at least two configured serving cells are not the same, or if the terminal device is configured for at least one serving cell, Assuming that the setting related to eIMTA is set, or for FDD-TDD and serving cell FS2, the value of K _sPUSCH for TDD UL / DL setting can be obtained by referring to the uplink reference UL / DL setting for serving cell c. Good.

For TDD UL / DL settings 1 to 6, the value of K _sPUSCH may be given in a table corresponding to the TDD UL / DL settings for sPUSCH.

For TDD UL / DL setting 0, sPUSCH transmission in sTTI included in subframe 2 or 7 is performed on PDCCH / EPDCCH / sPDCCH in DCI format 0/4 / X with LSB of UL index set to “1”. If scheduled, the value of K _sPUSCH may be, for example, the number of sTTIs corresponding to 7 subframe lengths. In other words, the DCI format 0/4 / X at this time may be detected in the sTTI included in the subframe seven times before the subframe including sTTIx. Further, if sPUSCH transmission in the sTTI included in subframe 3 or 8 is scheduled on PDCCH / EPDCCH / sPDCCH of DCI format 0/4 / X in which the LSB of the UL index is set to “1”, K The value of _sPUSCH may be, for example, the number of sTTIs corresponding to eight subframe lengths. In other words, the DCI format 0/4 / X at this time may be detected in the sTTI included in the subframe eight before the subframe including sTTIx. Further, if sPUSCH transmission in the sTTI included in subframe 4 or 9 is scheduled on PDCCH / EPDCCH / sPDCCH of DCI format 0/4 / X in which the LSB of the UL index is set to “1”, K The value of _sPUSCH may be, for example, the number of sTTIs corresponding to four subframe lengths. In other words, the DCI format 0/4 / X at this time may be detected in the sTTI included in the subframe four times before the subframe including sTTIx. For other sPUSCH transmissions, the value of K _sPUSCH may be provided in a table corresponding to the TDD UL / DL configuration for sPUSCH.

The value of K _sPUSCH may be determined based on a value set in a transmission subframe of sPUSCH or a field indicating transmission sTTI included in DCI format _0/4 / X / 3 / 3A / Z. For example, the value corresponding to “8” is set in the field indicating the transmission subframe of the sPUSCH included in the DCI format 0/4 / X / 3 / 3A / Z accompanied by the TPC command for the sPUSCH detected by sTTIn. If so, the value of K _sPUSCH for sPUSCH transmission in sTTIn + 8 may be 8. Also, the field indicating the transmission subframe or transmission sTTI of the sPUSCH may be included in DCI format 0/4 / X instead of the UL index.

For a terminal device that does not support the capability for the serving cell c and the BL / CE, the terminal device configured with the sTTI operation is configured for the DCI format 0/4 / X or the SPS C-RNTI with the C-RNTI of the terminal device. Decoding of sPDCCH of DCI format 0 / X or DCI format 3 / 3A / Z with TPC-sPUSCH-RNTI of the terminal device every sTTI except during DRX operation or when serving cell c is deactivated You may try.

  Next, when the sDCI included in the DL-sTTI of the predetermined symbol according to the present embodiment includes the TPC command for the PUSCH, for example, one serving cell when the sPDCCH includes the DCI format 0/4/3 / 3A An example of PUSCH transmission power control will be described. Note that the number of symbols constituting one sTTI is described assuming a case where an NCP is added to each OFDM symbol and / or SC-FDMA symbol. However, this does not exclude the case where ECP is given to each OFDM symbol and / or SC-FDMA symbol.

Based on a certain upper layer parameter, it may be set whether or not the time from when the DCI format used for PUSCH scheduling is detected to when the PUSCH is transmitted is reduced. Further, the value of K _PUSCH may be shortened based on the certain upper layer parameter. For example, when the TTI length of the DL-sTTI is 7 symbols, that is, when one subframe includes two sTTIs, the value of K _PUSCH is 2 subframes for FDD or FDD-TDD and serving cell FS1. Or it may be 4sTTIs. That is, power adjustment of the transmission power of the PUSCH may be performed on the PUSCH of the subframe i using the TPC command for the PUSCH detected in the DL-sTTI 4sTTIs before.

When the number of symbols constituting the DL-sTTI (that is, the TTI length of the DL-sTTI) is two, that is, when one subframe includes six sTTIs, the FDD or the FDD-TDD and the serving cell FS1 Thus, the value of K _PUSCH may be one subframe or 6s TTIs. That is, power adjustment of the transmission power of the PUSCH may be performed on the PUSCH of the subframe i using the TPC command for the PUSCH detected in the DL-sTTI 6 sTTIs before.

If the number of symbols constituting the DL-sTTI is 7, that is, if one subframe includes two DL-sTTIs, the value of K _PUSCH for TDD UL / DL settings 1 to 6 is It may be provided based on a table corresponding to the TDD UL / DL setting described in FIG.

When the number of symbols constituting the DL-sTTI is seven, for TDD UL / DL setting 0, PUSCH transmission in subframe 3 or 8 is performed in DCI format 0 in which the LSB of the UL index is set to “1”. If scheduled on the PDCCH / EPDCCH / sPDCCH with / 4, the value of K _PUSCH may be, for example, 3sTTIs or 2 subframes. Here, a case where the LSB of the UL index is set to “1” is described. For example, even when a predetermined bit of the UL index is set to “1” or “a predetermined value”, Good. The following may include a similar example.

Further, when the number of symbols constituting the DL-sTTI is seven, for TDD UL / DL setting 0, the PUSCH transmission in subframe 4 or 9 is performed by the DCI with the LSB of the UL index set to “1”. If scheduled on the PDCCH / EPDCCH / sPDCCH with format 0/4, the value of K _PUSCH may be, for example, 5sTTIs or 3 subframes.

In addition, when the number of symbols constituting the DL-sTTI is 7, TDD UL / DL setting is 0, and in other cases, the value of K _PUSCH is TDD UL / DL shown in FIG. / DL setting may be provided based on a table corresponding to the / DL setting.

When the number of symbols constituting the DL-sTTI is two, for example, when one subframe includes six DL-sTTIs, the value of K _PUSCH for TDD UL / DL settings 1 to 6 May be provided based on a table corresponding to the TDD UL / DL settings.

When the number of symbols constituting the DL-sTTI is two, for example, when one subframe includes six DL-sTTIs, the TDD UL / DL setting 0 and the subframe 3 or 8 If the PUSCH transmission is scheduled on the PDCCH / EPDCCH / sPDCCH with DCI format 0/4 with the LSB of the UL index set to “1”, the value of K _PUSCH may be, for example, 6sTTIs or 1 subframe. There may be. Otherwise, for TDD UL / DL configuration 0, the value of K _PUSCH may be provided based on a table corresponding to the TDD UL / DL configuration.

Note that the value of K _PUSCH may be determined based on a value set in a field indicating a transmission subframe of PUSCH included in DCI format 0/4 / X / 3 / 3A / Z. For example, a value corresponding to “4” is set in a field indicating a PUSCH transmission subframe included in the DCI format 0/4 / X / 3 / 3A / Z accompanied by a TPC command for the PUSCH detected by sTTIn. If so, the value of K _PUSCH for the PUSCH transmission of the subframe including sTTIn + 4 may be 4. That is, in the field indicating the PUSCH transmission subframe included in the DCI format 0/4 / X / 3 / 3A / Z accompanied by the TPC command for the PUSCH detected by sTTIn, “B (B is a predetermined value)” Assuming that a corresponding value is set, the value of K _PUSCH for PUSCH transmission of a subframe including sTTIn + B may be B. Also, the field corresponding to “4” corresponds to the field indicating the PUSCH transmission subframe included in the DCI format 0/4 / X / 3 / 3A / Z accompanied by the TPC command for the PUSCH detected in the subframe i including sTTIn. Assuming that a value is set, the value of K _PUSCH for PUSCH transmission in subframe i + 4 may be 4. That is, in the field indicating the PUSCH transmission subframe included in the DCI format 0/4 / X / 3 / 3A / Z accompanied by the TPC command for the PUSCH detected in subframe i including sTTIn, “C (C is a predetermined If the value corresponding to “) is set, the value of K _PUSCH for the PUSCH transmission of subframe i + C may be C. Also, the field indicating the PUSCH transmission subframe may be included in DCI format 0/4 instead of the UL index.

  Next, an example of transmission power control for sPUSCH and PUSCH when transmission of sPUSCH and PUSCH is set in one serving cell according to the present embodiment will be described.

  When the number of symbols constituting the DL-sTTI is set to 7 symbols, the number of symbols constituting the UL-sTTI may be set to 7 symbols. When the number of symbols constituting the DL-sTTI is set to 2 symbols, the number of symbols constituting the UL-sTTI may be set to 2 symbols or 7 symbols. That is, it is preferable that the UL-sTTI and the UL-TTI have the same length as the DL-sTTI or a TTI length longer than the DL-sTTI.

Figure 4 is a diagram showing an example of a correspondence relationship between f _{c (i)} of each sub-frame and DCI format including the TPC command according to the present embodiment. Subframes n to n + 7 in FIG. 4 belong to the same uplink power control subframe set. f _c (i) is a power control adjustment value used for the transmission power of the PUSCH or sPUSCH of the subframe i in the serving cell c. In FIG. 4, _fc (i) is not reset at least from subframe n to subframe 7. Also, in FIG. 4, f _c (n + 1) is a power control adjustment value obtained by TPC accumulation from subframe 0 to subframe n + 1. The DCI formats 400 and 402 are DCI formats used for PUSCH scheduling for the serving cell c, respectively. The DCI formats 401, 403, 404, and 405 are DCI formats used for sPUSCH scheduling for the serving cell c. Each of the DCI formats 400 to 405 includes a TPC command. The terminal device detects DCI formats 400 and 401 in subframe n. Also, the terminal device detects DCI formats 402 and 403 in subframe n + 2. Further, the terminal device detects the DCI format 404 in the subframe n + 3. Further, the terminal device detects DCI format 405 in subframe n + 5. Each of the DCI formats 400 to 405 may include a field indicating the transmission subframe or transmission sTTI of the above-described PUSCH or sPUSCH. The dotted lines in FIG. 4 indicate the correspondence between the DCI formats 400 to 405 and the PUSCHs 410, 411 and sPUSCHs 420, 421, 422, 423. For example, the DCI format 400 is used for scheduling the PUSCH 410 of the subframe n + 3. The DCI format 401 is used for scheduling the sPUSCH 420 of the subframe n + 2. Similarly, DCI formats 402 through 405 may also be used for PUSCH or sPUSCH scheduling, respectively. Each correction value obtained by the TPC command included in the DCI format 400 405, A, B, C, D, E, if it is F, and, in the same serving cell PUSCH and sPUSCH of _f c (i) is shared When the TPC accumulation is valid, and when the DCI format 400 to 405 includes the above-described PUSCH or sPUSCH transmission subframe or the field indicating the transmission sTTI, respectively, the transmission of the sPUSCH 420 in the subframe n + 2 F _c (n + 2) used for the electric power is f _c (n + 1) + A. Similarly, _f c used in the transmission power of PUSCH410 in subframe n + 3 (n + 3) _is, f c (n + 1) is a + A + B. Similarly, _f c used in the transmission power of sPUSCH421 in subframe n + 4 (n + 4) _is f c (n + 1) + A + B + C, f c (n + 4) used in the transmission power of sPUSCH422 in subframe n + 4 is _{f c} (N + 1) + A + B + C + D. Similarly, _f c used in the transmission power of PUSCH411 in subframe n + 6 (n + 6) _is, f c (n + 1) is a + A + B + C + D + E. Similarly, _f c used in the transmission power of sPUSCH423 in subframe n + 7 (n + 7) _is f c (n + 1) + A + B + C + D + E + F.

Each correction value obtained by the TPC command included in the DCI format 400 405, A, B, C, D, E, if it is F, and, in the same serving cell PUSCH and sPUSCH of _f c (i) is shared If it and, if TPC accumulation is enabled, _f c used in the transmission power of sPUSCH420 in subframe n + 2 (n + 2) _may be f c (n + 1) + a. Similarly, _f c used in the transmission power of PUSCH410 in subframe n + 3 (n + 3) _is, f c (n + 1) is a + A + B. Similarly, _f c used in the transmission power of sPUSCH421 in subframe n + 4 (n + 4) _is f c (n + 1) + A + B + C, f c (n + 4) used in the transmission power of sPUSCH422 in subframe n + 4 is _{f c} (N + 1) + A + B + C + D. Similarly, PUSCH 411 in subframe n + 6
F _c (n + 6) used for the transmission power of ( _c ) may be f _c (n + 1) + A + B + C + D + E. Similarly, subframe n + 7 in sPUSCH423 _f c used in the transmission power of the (n + 7) _may be f c (n + 1) + A + B + C + D + E + F.

Moreover, each correction value obtained by the TPC command included in the DCI format 400 405, A, B, C , D, E, if it is F, and, in the same serving cell PUSCH and sPUSCH of _f c (i) is If shared, and if TPC accumulation is valid, and if the DCI formats 400 to 405 do not include the PUSCH or sPUSCH transmission subframe or the field indicating the transmission sTTI, respectively, the subframe f _c (n + 3) used for the transmission power of the PUSCH 410 at n + 3 may be f _c (n + 1) + A. Further, _f c (n + 4) used in the transmission power of sPUSCH421 in subframe n + 4 _may be f c (n + 1) + A + C. Further, _f c (n + 4) used in the transmission power of sPUSCH422 in subframe n + 4 _may be f c (n + 1) + A + C + D. Further, _f c (n + 6) used for transmitting power of PUSCH411 in subframe n + 6 _may be f c (n + 1) + A + C + D. Further, _f c (n + 7) used for transmitting power of sPUSCH423 in subframe n + 7 _may be f c (n + 1) + A + C + D + F.

Each correction value obtained by the TPC command included in the DCI format 400 405, A, B, C, D, E, if it is F, and, in the same serving cell PUSCH and sPUSCH of _f c (i) is shared If the TPC accumulation is valid and the number of bits forming the TPC command for the sPUSCH is larger than the number of bits forming the TPC command for the PUSCH, the transmission power of the PUSCH 410 in the subframe n + 3 is used. f _c (n + 3) may be f _c (n + 1) + A. Further, _f c (n + 4) used in the transmission power of sPUSCH421 in subframe n + 4 _may be f c (n + 1) + A + C. Further, _f c (n + 4) used in the transmission power of sPUSCH422 in subframe n + 4 _may be f c (n + 1) + A + C + D. Further, _f c (n + 6) used for transmitting power of PUSCH411 in subframe n + 6 _may be f c (n + 1) + A + C + D. Further, _f c (n + 7) used for transmitting power of sPUSCH423 in subframe n + 7 _may be f c (n + 1) + A + C + D + F.

Each correction value obtained by the TPC command included in the DCI format 400 405, A, B, C, D, E, if it is F, and, in the same serving cell PUSCH and sPUSCH of _f c (i) is shared If it and, if TPC accumulation is enabled, _f c used in the transmission power of PUSCH410 in subframe n + 3 (n + 3) _may be f c (n + 1) + a. Further, _f c (n + 4) used in the transmission power of sPUSCH421 in subframe n + 4 _may be f c (n + 1) + A + C. Further, _f c (n + 4) used in the transmission power of sPUSCH422 in subframe n + 4 _may be f c (n + 1) + A + C + D. Further, _f c (n + 6) used for transmitting power of PUSCH411 in subframe n + 6 _may be f c (n + 1) + A + C + D. Further, _f c (n + 7) used for transmitting power of sPUSCH423 in subframe n + 7 _may be f c (n + 1) + A + C + D + F.

That is, before transmitting the PUSCH corresponding to the DCI format detected in the first subframe, the sPUSCH corresponding to the DCI format detected in the second subframe after the first subframe is transmitted. , The correction value obtained by the TPC command included in the DCI format detected in the first subframe may not be applied to the transmission power of the PUSCH. That is, in this case, the correction value obtained by the TPC command included in the DCI format detected in the second subframe is applied to the transmission power of the PUSCH corresponding to the DCI format detected in the first subframe. You may.

  If the number of bits forming the TPC command for the sPUSCH is larger than the number of bits forming the TPC command for the PUSCH, the first sub-frame is transmitted before transmitting the PUSCH corresponding to the DCI format detected in the first sub-frame. If the sPUSCH corresponding to the DCI format detected in the second subframe after the frame is transmitted, the correction value obtained by the TPC command included in the DCI format detected in the first subframe is the transmission power of the PUSCH. It may not be applied to. That is, in this case, the correction value obtained by the TPC command included in the DCI format detected in the second subframe is applied to the transmission power of the PUSCH corresponding to the DCI format detected in the first subframe. You may.

  In FIG. 4, DCI formats 400 to 405 have been described as being used for PUSCH or sPUSCH scheduling. However, in order to transmit only TPC commands for PUSCH or sPUSCH as in DCI format 3 / 3A / Z, May be used.

Here, TPC accumulation is invalid, that is, TPC accumulation (i.e., accumulation process of the correction value obtained by the TPC command) if not performed, is used to transmit power of sPUSCH420 in subframe _{n + 2 f c (n +} 2) May be A. Similarly, f _c (n + 3) used for the transmission power of PUSCH 410 in subframe n + 3 may be B. Similarly, _f c used in the transmission power of sPUSCH421 in subframe n + 4 (n + 4) may be C. Similarly, f _c (n + 4) used for the transmission power of sPUSCH 422 in subframe n + 4 may be D. Similarly, f _c (n + 6) used for the transmission power of PUSCH 411 in subframe n + 6 may be E. Similarly, f _c (n + 7) used for transmission power of PUSCH 423 in subframe n + 7 may be F.

  In a single serving cell, when simultaneous transmission of sPUSCH and PUSCH is not set, assuming that transmission of sPUSCH and PUSCH overlaps in the same subframe (for example, subframe i), the terminal device transmits one of the physical channels May be dropped. In addition, assuming that transmission of the sPUSCH and the PUSCH occurs in the same subframe, the terminal device may drop a resource or a symbol overlapping with the sPUSCH (that is, an overlapping portion) in the PUSCH. That is, the terminal device may give priority to transmission of the sPUSCH and drop transmission of PUSCH resources or symbols overlapping with the sPUSCH. At that time, the correction value obtained by the TPC command for the PUSCH may not be applied to the transmission power of the sPUSCH.

When transmission of sPUSCH and PUSCH is set in one serving cell (for example, serving cell c), a path loss value used for transmission power of sPUSCH and a path loss value used for transmission power of PUSCH may be shared. That is, when the sPUSCH and the PUSCH are transmitted in the same serving cell, the path loss value obtained from the RSRP measurement based on the CRS of the same serving cell may be shared by the sPUSCH and the PUSCH. When sPUSCH and PUSCH are transmitted in the same serving cell, path loss reference linking for sPUSCH and path loss reference linking for PUSCH may be the same. That is, when sPUSCH and PUSCH are transmitted in the same serving cell, path loss reference linking may be set for each serving cell.

When the DL-sTTI is set and the PDCCH is assigned only to the first DL-sTTI in the subframe, that is, the TPC command for the PUSCH is transmitted to the first DL-sTTI in the subframe (in other words, the PDCCH). When only assigned to the DCI format included in the region, the value of K _PUSCH may be 4 for FDD or FDD-TDD and serving cell FS1. Also, for TDD UL / DL settings 1 to 6, the value of K _PUSCH may be provided based on a table corresponding to the TDD UL / DL settings. For TDD UL / DL setting 0, the value of K _PUSCH may be given as described above.

When the DL-sTTI is set, and when the PDCCH is detected only in the first DL-sTTI in the subframe, that is, when the TPC command for the PUSCH is received only in the first DL-sTTI in the subframe , FDD or FDD-TDD, and the serving cell FS1, the value of K _PUSCH may be 4. Also, for TDD UL / DL settings 1 to 6, the value of K _PUSCH may be provided based on a table corresponding to the TDD UL / DL settings. For TDD UL / DL setting 0, the value of K _PUSCH may be given as described above.

  For TDD, the number of symbols constituting the DL-sTTI and the number of symbols constituting the UL-sTTI are preferably the same.

When the DCI format used for scheduling DCI format and sPUSCH used for scheduling of PUSCH is defined as different DCI formats, _f c (i) is for _f c (i) and sPUSCH for PUSCH, as a separate parameter May be specified. If the TPC accumulation is valid, the accumulation may be performed individually.

If the transmission subframe of a transmission sub-frame and sPUSCH the PUSCH belong to different uplink power control sub-frame set, respectively, _f c (i) with respect to _f c (i) and sPUSCH for PUSCH is defined as a separate parameter You may. If the PUSCH transmission subframe and the sPUSCH transmission subframe belong to different uplink power control subframe sets, and if the TPC accumulation for each of the PUSCH and the sPUSCH is valid, the terminal device transmits f to the PUSCH. may be performed TPC accumulation separately for _c (i) and _f for sPUSCH c (i).

In one serving cell, when the simultaneous transmission of sPUSCH and PUSCH is not set, if the transmission of the transmission and the PUSCH sPUSCH occurs in different subframes, _f c for sPUSCH and _f c (i) for PUSCH (i) May be shared. That, _f c for PUSCH (i) is, may be reflected in _f c (i) for sPUSCH, _f c for sPUSCH (i) may be reflected in _f c (i) for the PUSCH.

_{If f} c (i) with respect to _f c (i) and sPUSCH is shared for PUSCH, that is, _{if f} c (i) is calculated using the TPC command for the TPC commands and sPUSCH for PUSCH, TPC command for PUSCH May be different from the timing at which the TPC command for the sPUSCH is applied. For example, the value of K _{PUSCH and} the value of K _sPUSCH may be different values under the above-described conditions.

Also, if different from the conditions when to apply the TPC command for the timing and sPUSCH applying a TPC command for PUSCH is described above, _f c for sPUSCH and _f c (i) for PUSCH (i) may be shared .

In the DCI format 0/4 / X / 3 / 3A / Z, a field indicating the PUSCH transmission subframe or a field indicating the sPUSCH transmission sTTI (may be a transmission subframe instead of the transmission sTTI). when included, _f c for sPUSCH and _f c (i) for PUSCH (i) may be shared.

In sub-frame i, if the transmission of the at least one SPUSCH is performed, the sub-frame i + 1 _f used in the transmission power of PUSCH in _{c (i + 1), f} c used in the transmission power of sPUSCH (i) May be applied. Also, assuming that subframe i and subframe i + 1 belong to the same uplink power control subframe set, f _c (i + 1) used for PUSCH transmission power in subframe i + 1 is used for sPUSCH transmission power. The applied f _c (i) may be applied. Otherwise, for example, assuming that subframe i and subframe i + 1 belong to different uplink power control subframe sets, for f _c (i + 1) used for PUSCH transmission power in subframe i + 1, sPUSCH _f c (i) used in the transmission power of may not be applied.

At a serving cell _when the c, _f c (i) and / or TPC accumulation for PUSCH and sPUSCH is shared, that is, if the TPC commands are reflected, or applied to one of the _f c (i) for each of the PUSCH and sPUSCH And the transmission of the sPUSCH is scheduled when the value of the K PUSCH for the _PUSCH is shortened or changed under the above-described conditions by allowing the transmission of the sPUSCH, and after being scheduled for the transmission of the PUSCH. , SPUSCH transmission is performed in a subframe earlier than the subframe in which PUSCH transmission is performed, the value of the TPC command included in the DCI format used for PUSCH scheduling is set to sPUS H may be applied to f _{c (i)} used for transmission power.

When the sTTI operation is performed, and the timing at which the DCI format 0/4 is applied changes and the timing at which the DCI format 3 / 3A is applied changes, that is, the DCI format 0/4/3 / is changed by the sTTI operation. If the processing time for 3A is reduced, and if DCI format 0/4 and DCI format 3 / 3A are received in the same subframe, the correction value obtained from the DCI format 3 / 3A TPC command is the transmission power of PUSCH. It may not be applied to _fc (i) used for.

When performing the sTTI operation, and when the timing at which the DCI format 0/4 is applied does not change, and when the timing at which the DCI format 3 / 3A is applied changes, that is, processing on the DCI format 0/4 by the sTTI operation If the time is not shortened and the processing time for DCI format 3 / 3A is reduced by the sTTI operation, if DCI format 0/4 and DCI format 3 / 3A are received in the same subframe, DCI format 3 / 3A is received. The correction value obtained from the 3A TPC command may be applied to _fc (i) used for the transmission power of the PUSCH.

When the TPC accumulation is valid and the terminal device performs the sTTI operation, the correction value obtained from the TPC command for sPUSCH / sTTI included in the second slot in subframe i is 2 in subframe i. If the decoding of the TPC command for the sPUSCH / sTTI included in the third slot does not end earlier than the PUSCH transmission in subframe i, the transmission power of the PUSCH / TTI in subframe i may not be reflected or applied. However, for the next subframe, the correction value obtained by the TPC command for sPUSCH / sTTI included in the second slot in subframe i is applied to f _c (i + 1) for PUSCH of subframe i + 1 or sPUSCH. May be done. That, _f c (i + 1) for the PUSCH or sPUSCH may be given based on the _f c (i).

  When the TPC accumulation is valid, when the terminal device performs the sTTI operation, and when the transmission of the PUSCH and the transmission of the sPUSCH collide in the subframe i, and the transmission of the sPUSCH is 1 in the subframe i, If so, the transmission of the PUSCH in subframe i may be dropped. In subframe i, the correction value obtained by the TPC command for PUSCH may not be applied.

  When TPC accumulation is valid, when the terminal device performs the sTTI operation, and when subframe i and subframe i-2 belong to the same uplink power control subframe set in serving cell c, and After the transmission of the PUSCH in frame i is scheduled in subframe i-4, if the transmission of the sPUSCH in subframe i-2 is scheduled in subframe i-3, the TPC received in subframe i-4 The correction value obtained from the command may be applied to the sPUSCH transmission power for subframe i-2.

Also, when TPC accumulation is valid, and when the terminal device performs sTTI operation, and in the serving cell c, subframe i and subframe i-2 belong to the same uplink power control subframe set, and If the transmission of the sPUSCH in subframe i-2 is scheduled in subframe i-3 after the transmission of the PUSCH in subframe i is scheduled in subframe i-4, the reception in subframe i-4 The correction value obtained from the obtained TPC command may not be applied to the transmission power of PUSCH for subframe i. That is, the TPC command detected in subframe i-4 may be dropped. Also, assuming that subframe i and subframe i-2 do not belong to the same uplink power control subframe set, the correction value obtained from the TPC command for PUSCH and the TPC command for sPUSCH is in frame set may be applied to _f c (i) or _{f c,} 2 (i) used in the transmission power of the PUSCH or SPUSCH.

If TPC accumulation is disabled (that is, if TPC absolute), and, when the terminal apparatus performs sTTI operations, and, in TPC absolute, of the same serving cell sPUSCH and PUSCH of _f c (i) is shared In this case, the correction value obtained from the TPC command for the sPUSCH / sTTI included in the second slot in subframe i is determined by decoding the TPC command for the sPUSCH / sTTI included in the second slot in subframe i. Assuming that the transmission is not completed before the PUSCH transmission in i, the transmission power of the PUSCH / TTI in subframe i may not be reflected or applied. However, the correction value obtained by the TPC command for sPUSCH / sTTI included in the second slot in subframe i may be applied to the PUSCH transmission of the next subframe (subframe i + 1). For example, when subframe i and subframe i-2 belong to the same uplink power control subframe set, and after transmission of PUSCH in subframe i is scheduled in subframe i-4, subframe i-2 Is scheduled in subframe i-3, the correction value obtained from the TPC command for the sPUSCH received in subframe i-3 is the transmission power of sPUSCH in subframe i-2 and the subframe i may be applied to the transmission power of the PUSCH in i. That is, a correction value obtained from the latest TPC command of the same subframe set may be applied to the transmission power of the PUSCH or sPUSCH in subframe i. In other cases, for example, assuming that subframe i and subframe i-2 do not belong to the same uplink power control subframe set, the correction value obtained from the TPC command for PUSCH and the TPC command for sPUSCH is in each of the uplink power control sub-frame set may be applied to _f c used in the transmission power of the PUSCH or sPUSCH (i) or _{f c,} 2 (i). Also, in TPC absolute, if not shared in the same serving cell sPUSCH and PUSCH of _f c (i) is the correction value obtained from the TPC command for PUSCH is applied to the transmission power for PUSCH, from TPC command for sPUSCH The correction value to be applied may be applied to the transmission power for the sPUSCH.

  For example, a DCI format (that is, a first DCI format and a second DCI format) used for scheduling PUSCH and sPUSCH transmitted in an uplink subframe belonging to the same uplink power control subframe set in the same downlink subframe set If the sPUSCH transmission timing is earlier than the PUSCH transmission timing, the sPUSCH transmission power is not only determined by the TPC command included in the DCI format used for the sPUSCH scheduling, but also by the PUSCH scheduling. A correction value obtained by a TPC command included in the used DCI format may also be applied. Further, not only the TPC command included in the DCI format used for the scheduling of the PUSCH, but also the correction value obtained by the TPC command included in the DCI format used for the scheduling of the sPUSCH is applied to the transmission power of the PUSCH. Good.

  Also, when the sTTI operation is set, and the uplink power control of the PUSCH and the sPUSCH of the same serving cell is shared, and the DCI format including the TPC command for the PUSCH and / or the DCI format including the TPC command for the sPUSCH In the case where a field indicating the subframe or sTTI to which the TPC command is applied is set, the TPC command may be applied in the subframe or sTTI indicated by the field. The name of the field indicating the subframe or sTTI to which the TPC command is applied may change depending on the type of DCI format. For example, when the DCI format 0/4 / X includes the field, the field may be referred to as a transmission subframe of the PUSCH or sPUSCH or a field indicating the transmission sTTI. Whether the field is included in the DCI format may be determined based on upper layer parameters. For example, when the first DCI format used for PUSCH scheduling and the second DCI format used for sPUSCH scheduling are detected in the same downlink subframe (for example, subframe n), the first DCI format is detected. Indicate the transmission after three subframes (eg, PUSCH transmission in subframe n + 3), and the field included in the second DCI format indicates the transmission after two subframes (eg, , SPUSCH transmission in subframe n + 2), the correction value obtained by the TPC command included in the first DCI format is not applied to the transmission power of sPUSCH in subframe n + 2. Good. Also, assuming that subframe n + 2 and subframe n + 3 belong to the same uplink power control subframe set, the transmission power of PUSCH in subframe n + 3 is obtained by the TPC command included in the second DCI format. May be applied.

In the case where for the serving cell c, the parameters relating to uplink power control for PUSCH _{(e.g., P O - NOMINAL - PUSCH} or _{P O_UE_PUSCH)} parameters relating to uplink power control for the SPUSCH _{(e.g., P O_NOMINAL_sPUSCH} and _{P O_UE_sPUSCH)} is set to the same value, _f c (i) with respect to _f c (i) and sPUSCH may be shared for PUSCH. The transmission power for sPUSCH is, when it is set by using parameters relating to uplink power control for PUSCH, _f c (i) with respect to _f c (i) and sPUSCH may be shared for PUSCH. Further, _f c for PUSCH based on some higher layer parameters (i) the case _{where f} c (i) is set to be shared for sPUSCH, _f for SPUSCH and _f c (i) for the PUSCH c (i) May be shared. Otherwise, _f c for sPUSCH and _f c (i) for PUSCH (i) may not be shared. That is, depending on the conditions, and _{if f} c (i) and _f for sPUSCH c (i) is set individually for PUSCH, there may be a case that is set as common parameters.

  When SPS is set for sPUSCH, when DCI format 0/4 for PUSCH and DCI format 3 / 3A for sPUSCH are received in the same subframe, correction obtained by a TPC command included in DCI format 3 / 3A A value may be applied.

  The communicable range (communication area) of each frequency controlled by the base station device is regarded as a cell. At this time, the communication area covered by the base station device may have a different size and a different shape for each frequency. Further, the coverage area may be different for each frequency. A wireless network in which cells having different types of base station devices and different cell radii are mixed in the same frequency and / or different frequency areas to form one communication system is called a heterogeneous network. .

  The terminal device is not connected to any network (serving cell managed by the network) immediately after the power is turned on (for example, at the time of startup). Such a disconnected state is called an idle mode (RRC idle). The terminal device in the idle mode needs to be connected to any network in order to perform communication. That is, the terminal device needs to be in the connection mode (RRC connection). Here, the network may include a base station device, an access point, a network server, a modem, and the like belonging to the network.

  A technology in which a terminal device and a base station device aggregate (aggregate) frequencies (component carriers or frequency bands) of a plurality of different frequency bands (frequency bands) by CA and treat them as one frequency (frequency band). May be applied. The component carriers include an uplink component carrier corresponding to the uplink (uplink cell) and a downlink component carrier corresponding to the downlink (downlink cell). In the present embodiment, a frequency and a frequency band may be used interchangeably.

For example, when five component carriers having a frequency bandwidth of 20 MHz are aggregated by the CA, a terminal device capable of performing the CA may perform transmission and reception by regarding these as a frequency bandwidth of 100 MHz. Note that the component carriers to be aggregated may be continuous frequencies, or may be frequencies that are all or partially discontinuous. For example, when the usable frequency band is the 800 MHz band, the 2 GHz band, and the 3.5 GHz band, one component carrier is transmitted in the 800 MHz band, another component carrier is transmitted in the 2 GHz band, and another component carrier is transmitted in the 3.5 GHz band. May be. The terminal device and / or the base station device may perform transmission and / or reception simultaneously using component carriers (component carriers corresponding to cells) belonging to those operating bands.

  It is also possible to aggregate a plurality of continuous or discontinuous component carriers in the same frequency band. The frequency bandwidth of each component carrier may be a frequency bandwidth (for example, 5 MHz or 10 MHz) narrower than the receivable frequency bandwidth (for example, 20 MHz) of the terminal device, and the aggregated frequency bandwidths are different. Is also good. A terminal device and / or a base station device having an NR (New Radio, New Radio Access Technology) function may support both a cell having backward compatibility with an LTE cell and a cell having no backward compatibility. .

  Further, the terminal device and / or the base station device having the LR function may aggregate a plurality of component carriers (carrier types, cells) that are not backward compatible with LTE. Note that the number of uplink component carriers that the base station device allocates (sets or adds) to the terminal device may be equal to or less than the number of downlink component carriers.

  A cell composed of an uplink component carrier for setting up an uplink control channel for requesting a radio resource and a downlink component carrier connected cell-specifically to the uplink component carrier is called a PCell. A cell configured from a component carrier other than the PCell is called an SCell. The terminal device performs the reception of the paging message, the detection of the update of the broadcast information, the initial access procedure, the setting of the security information, and the like in the PCell, but the SCell does not have to perform these.

  PCells are not subject to activation and deactivation control (ie, are always considered activated), but SCells have activation and inactivation states, These state changes are explicitly specified by the base station apparatus, and the states are changed based on a timer set in the terminal apparatus for each component carrier. The PCell and the SCell are collectively referred to as a serving cell (serving cell).

  When performing communication using both the LTE cell and the LR cell, the terminal device and / or the base station device supporting both the LTE cell and the LR cell form a cell group related to the LTE cell and a cell group related to the LR cell. May be. That is, a cell corresponding to PCell may be included in each of the cell group related to the LTE cell and the cell group related to the LR cell.

  Note that CA is communication by a plurality of cells using a plurality of component carriers (frequency bands), and is also referred to as cell aggregation. Note that the terminal device may be wirelessly connected (RRC connected) to the base station device via a relay station device (or a repeater) for each frequency. That is, the base station device of the present embodiment may be replaced with a relay station device.

  The base station device manages a cell, which is an area where the terminal device can communicate with the base station device, for each frequency. One base station device may manage a plurality of cells. Cells are classified into a plurality of types according to the size (cell size) of an area that can communicate with the terminal device. For example, cells are classified into macro cells and small cells. Furthermore, small cells are classified into femtocells, picocells, and nanocells according to the size of the area. Further, when the terminal device can communicate with a certain base station device, among the cells of the base station device, a cell set to be used for communication with the terminal device is a serving cell, and is used for other communication. Unused cells are called neighbor cells.

  In other words, in CA, a plurality of serving cells configured include one PCell and one or more SCells.

  The PCell is a serving cell in which an initial connection (initial RRC connection) establishment procedure has been performed, a serving cell in which a connection (RRC connection) reestablishment procedure has started, or a cell instructed as PCell in the handover procedure. PCell operates at the primary frequency. The SCell may be set at or after the connection is (re) established. The SCell operates at a secondary frequency. Note that the connection may be referred to as an RRC connection. For a terminal device supporting CA, one PCell and one or more SCells may be aggregated.

  If more than one serving cell is configured or if a secondary cell group is configured, the terminal device may define a transport block code for at least a predetermined number of transport blocks for each serving cell. According to the decoding failure of the block, the received soft channel bits corresponding to at least a predetermined range may be held.

  The LAA terminal may support functions corresponding to two or more radio access technologies (RATs).

  LAA terminals support more than one operating band. That is, the LAA terminal supports a function related to CA.

  Also, the LAA terminal may support TDD or HD-FDD. Also, the LAA terminal may support FD-FDD. The LAA terminal may indicate which duplex mode / frame structure type is supported via higher layer signaling such as capability information.

  The LAA terminal may be an LTE terminal of category X (X is a predetermined value). That is, the LAA terminal may extend the maximum number of bits of the transport block that can be transmitted / received in one TTI. In LTE, one TTI corresponds to one subframe.

  In the present embodiment, the TTI and the subframe may be defined individually.

  Also, the LAA terminal may support multiple duplex modes / frame structure types.

  FS1 is applicable to both FD-FDD and HD-FDD. In FDD, 10 subframes can be used for downlink transmission and uplink transmission at intervals of 10 ms. Also, uplink transmission and downlink transmission are separated in the frequency domain. In the HD-FDD operation, the terminal device cannot transmit and receive at the same time, but there is no limitation in the FD-FDD operation.

  The retuning time (time required for tuning (the number of subframes or the number of symbols)) when the frequency hopping or the used frequency is changed may be set by higher layer signaling.

For example, in the LAA terminal, the number of supported downlink transmission modes (PDSCH transmission modes) may be reduced. That is, when the number of downlink transmission modes or the downlink transmission mode supported by the LAA terminal is indicated as the capability information from the LAA terminal, the base station apparatus, based on the capability information, Set the downlink transmission mode. When a parameter for a downlink transmission mode that is not supported by the LAA terminal is set, the LAA terminal may ignore the setting. That is, the LAA terminal does not have to perform the process for the downlink transmission mode that is not supported. Here, the downlink transmission mode is used to indicate the transmission scheme of the PDSCH corresponding to the PDCCH / EPDCCH based on the set downlink transmission mode, the type of the RNTI, the DCI format, and the search space. The terminal device can determine, based on the information, whether the PDSCH is transmitted at antenna port 0, transmitted with transmission diversity, transmitted with a plurality of antenna ports, and the like. The terminal device can appropriately perform the receiving process based on the information. Even if DCI related to PDSCH resource allocation is detected from the same type of DCI format, if the downlink transmission mode or the type of RNTI is different, the PDSCH is not necessarily transmitted by the same transmission scheme.

  When the terminal device supports a function related to simultaneous transmission of PUCCH and PUSCH, and supports a function related to repeated transmission of PUSCH and / or repeated transmission of PUCCH, timing at which transmission of PUSCH occurs Alternatively, the PUCCH and the PUSCH may be repeatedly transmitted a predetermined number of times at the timing when the transmission of the PUCCH occurs. That is, simultaneous transmission of PUCCH and PUSCH may be performed at the same timing (ie, the same subframe).

  In such a case, the PUCCH may include a CSI report, HARQ-ACK, and SR.

  In the PCell, all signals can be transmitted and received. In the SCell, some signals may not be transmitted and received. For example, PUCCH is transmitted only by PCell. The PRACH is transmitted only by the PCell unless a plurality of TAGs (Timing Advance Groups) are set between cells. PBCH is transmitted only by PCell. The MIB is transmitted only by the PCell. However, if the terminal device supports the function of transmitting the PUCCH or MIB in the SCell, the base station device transmits the PUCCH or MIB to the terminal device in the SCell (frequency corresponding to the SCell). May be instructed to do so. That is, when the terminal device supports the function, the base station device may set a parameter for transmitting the PUCCH or MIB in the SCell to the terminal device.

  In the PCell, RLF (Radio Link Failure) is detected. SCell does not recognize that RLF has been detected even if the conditions for detecting RLF are satisfied. When the RLF condition is satisfied in the lower layer of the PCell, the lower layer of the PCell notifies the upper layer of the PCell that the RLF condition is satisfied. In the PCell, SPS (Semi-Persistent Scheduling) or DRX (Discontinuous Reception) may be performed. In the SCell, the same DRX as in the PCell may be performed. In the SCell, information / parameters related to MAC settings are basically shared with PCells in the same cell group. Some parameters (for example, sTAG-Id) may be set for each SCell. Some timers and counters may be applied only to PCell. A timer or a counter to be applied may be set only for the SCell.

FIG. 5 is a schematic diagram illustrating an example of a block configuration of the base station device 2 according to the present embodiment. The base station device 2 includes an upper layer (upper layer control information notification unit) 501 and a controller (base station controller) 502
, A codeword generation unit 503, a downlink subframe generation unit 504, an OFDM signal transmission unit (downlink transmission unit) 506, a transmission antenna (base station transmission antenna) 507, a reception antenna (base station reception antenna) 508, SC-FDMA A signal receiving unit (channel state measuring unit and / or CSI receiving unit) 509 and an uplink subframe processing unit 510 are provided. The downlink subframe generator 504 includes a downlink reference signal generator 505. In addition, the uplink subframe processing unit 510 includes an uplink control information extraction unit (CSI acquisition unit / HARQ-ACK acquisition unit / SR acquisition unit) 511. Note that the SC-FDMA signal receiving unit 509 also serves as a measuring unit for a received signal, CCA, and interference noise power. Note that the SC-FDMA signal receiving unit may be an OFDM signal receiving unit or may include an OFDM signal receiving unit when the terminal device supports transmission of an OFDM signal. Note that the downlink subframe generation unit may be a downlink TTI generation unit or may include a downlink TTI generation unit. The downlink TTI generation unit may be a generation unit of a physical channel and / or a physical signal constituting the downlink TTI. Note that the same may be applied to the uplink. Although not shown, the base station apparatus may include a power control unit (downlink power control unit) for controlling / setting the transmission power of the downlink signal. The base station device may include a transmission unit that transmits a TA command. Further, the base station apparatus may include a receiving unit that receives a measurement result regarding a time difference between reception and transmission reported from the terminal apparatus.

  FIG. 6 is a schematic diagram illustrating an example of a block configuration of the terminal device 1 according to the present embodiment. The terminal device 1 includes a reception antenna (terminal reception antenna) 601, an OFDM signal reception unit (downlink reception unit) 602, a downlink subframe processing unit 603, a transport block extraction unit (data extraction unit) 605, a control unit (terminal Control unit) 606, upper layer (upper layer control information acquisition unit) 607, channel state measurement unit (CSI generation unit) 608, uplink subframe generation unit 609, SC-FDMA signal transmission unit (UCI transmission unit) 611 and 612 , And transmission antennas (terminal transmission antennas) 613 and 614. The downlink subframe processing unit 603 includes a downlink reference signal extraction unit 604. In addition, the uplink subframe generation unit 609 includes an uplink control information generation unit (UCI generation unit) 610. Note that the OFDM signal receiving unit 602 also serves as a measuring unit for a received signal, CCA, and interference noise power. That is, RRM measurement may be performed in OFDM signal receiving section 602. When the terminal device supports transmission of an OFDM signal, the SC-FDMA signal transmission unit may be an OFDM signal transmission unit or may include an OFDM signal transmission unit. Note that the uplink subframe generator may be an uplink TTI generator or may include a downlink TTI generator. Although not shown, the terminal device may include a power control unit (uplink power control unit) for controlling / setting the transmission power of the uplink signal. The terminal device may include a measuring unit for measuring a time difference between reception and transmission of the terminal device. In addition, the terminal device may include a transmission unit that reports the measurement result of the time difference.

  5 and 6, the upper layer may include a MAC (Medium Access Control) layer, an RLC (Radio Link Control) layer, a PDCP (Packet Data Convergence Protocol) layer, and an RRC (Radio Resource Control) layer.

The RLC layer transmits TM (Transparent Mode) data, UM (Unknown Knowled Mode) data transmission to the upper layer, and PDU (Packet) of the upper layer.
Acknowledged mode (AM) data transmission including an indication that the transmission of the data unit (Data Unit) has been successful is performed. In addition, the lower layer notifies the data transmission and the transmission opportunity along with the total size of the RLC PDU transmitted at the transmission opportunity.

  The RLC layer has a function related to transmission of an upper layer PDU, a function related to error correction via ARQ (Automatic Repeat reQuest) (only for AM data transmission), and a function related to RLC SDU (Service only) for UM and AM data transmission. (Data Unit) combining / dividing / reconstructing functions (for AM data transmission) RLC data PDU re-dividing functions (only for AM data transmission) RLC data PDU rearranging functions (UM For duplication detection, only for AM and AM data transmissions, for RUM SDUs (only for UM and AM data transmissions), for RLC re-establishment, protocol errors (only for AM data transmissions) Supports functions related to detection.

  First, the flow of transmission and reception of downlink data will be described with reference to FIGS. In the base station apparatus 2, the control unit 502 includes an MCS (Modulation and Coding Scheme) indicating a modulation scheme and a coding rate in the downlink, a downlink resource allocation indicating an RB used for data transmission, and information used for HARQ control ( It holds the redundancy version, HARQ process number, and NDI (New Data Indicator), and controls the codeword generator 503 and the downlink subframe generator 504 based on these. Downlink data (also referred to as downlink transport block, DL-SCH data, and DL-SCH transport block) transmitted from the upper layer 501 is transmitted to the codeword generation unit 503 under the control of the control unit 502. Processing such as error correction coding and rate matching processing is performed to generate a codeword. In one subframe in one cell, up to two codewords are transmitted simultaneously. The downlink subframe generation unit 504 generates a downlink subframe according to an instruction from the control unit 502. First, the codeword generated by the codeword generation unit 503 is converted into a modulation symbol sequence by a modulation process such as PSK (Phase Shift Keying) modulation or QAM (Quadrature Amplitude Modulation) modulation. The modulation symbol sequence is mapped to REs in some RBs, and a downlink subframe for each antenna port is generated by precoding processing. At this time, the transmission data sequence transmitted from the upper layer 501 includes upper layer control information that is control information (for example, dedicated (individual) RRC signaling) in the upper layer. The downlink reference signal generation section 505 generates a downlink reference signal. The downlink subframe generation unit 504 maps a downlink reference signal to an RE in the downlink subframe according to an instruction from the control unit 502. The downlink subframe generated by the downlink subframe generation unit 504 is modulated into an OFDM signal by the OFDM signal transmission unit 506 and transmitted via the transmission antenna 507. Although a configuration having one OFDM signal transmission unit 506 and one transmission antenna 507 is illustrated here, when transmitting a downlink subframe using a plurality of antenna ports, the OFDM signal transmission unit 506 and the transmission antenna A configuration having a plurality of antennas 507 may be employed. Also, the downlink subframe generation unit 504 generates a physical layer downlink control channel such as a PDCCH / EPDCCH / sPDCCH or a control channel / shared channel corresponding to the PDCCH / EPDCCH / sPDCCH, and generates an RE in the downlink subframe. Can also be mapped. Each of the plurality of base station apparatuses transmits an individual downlink subframe.

  In the terminal device 1, the OFDM signal is received by the OFDM signal receiving unit 602 via the reception antenna 601, and the OFDM signal is subjected to OFDM demodulation processing.

The downlink subframe processing unit 603 first detects a physical layer downlink control channel such as a PDCCH / EPDCCH / sPDCCH or a control channel corresponding to the PDCCH / EPDCCH / sPDCCH. More specifically, the downlink sub-frame processing unit 603 transmits the PDCCH / EPDCCH / sPDCCH or PDCCH / EPDCCH /
In a region where a control channel / shared channel corresponding to sPDCCH is allocated, decoding is performed assuming that a control channel corresponding to PDCCH / EPDCCH / sPDCCH or PDCCH / EPDCCH / sPDCCH has been transmitted, and CRC bits added in advance are confirmed ( Blind decoding). That is, downlink subframe processing section 603 monitors a control channel / shared channel corresponding to PDCCH / EPDCCH / sPDCCH or PDCCH / EPDCCH / sPDCCH. When the CRC bit matches an ID (such as C-RNTI, SPS-C-RNTI, or another terminal-specific identifier (UEID) assigned to one terminal, or Temporary C-RNTI) assigned from the base station apparatus in advance. The downlink subframe processing unit 603 recognizes that the control channel / shared channel corresponding to the PDCCH / EPDCCH / sPDCCH or the PDCCH / EPDCCH / sPDCCH has been detected, and detects the detected PDCCH / EPDCCH / sPDCCH or PDCCH / EPDCCH / Using the control information included in the control channel corresponding to sPDCCH, a data channel / shared channel corresponding to PDSCH / sPDSCH or PDSCH / sPDSCH is extracted.

  The control unit 606 holds MCS indicating a modulation scheme and a coding rate in the downlink based on control information, downlink resource allocation indicating an RB used for downlink data transmission, and information used for HARQ control. And controls the downlink subframe processing unit 603, the transport block extraction unit 605, and the like. More specifically, control section 606 performs control to perform RE demapping processing and demodulation processing corresponding to RE mapping processing and modulation processing in downlink subframe generation section 504. The PDSCH / sPDSCH extracted from the received downlink subframe is sent to the transport block extracting section 605. Also, the downlink reference signal extraction unit 604 in the downlink subframe processing unit 603 extracts a DLRS from the downlink subframe.

  The transport block extracting section 605 performs rate matching processing in the codeword generating section 503, rate matching processing corresponding to error correction coding, error correction decoding, and the like, extracts transport blocks, and transmits the transport blocks to the upper layer 607. Can be The transport block includes upper layer control information, and the upper layer 607 notifies the control unit 606 of necessary physical layer parameters based on the upper layer control information. Note that the plurality of base station apparatuses 2 each transmit individual downlink subframes, and the terminal apparatus 1 receives these. Therefore, the above-described processing is performed on the downlink subframes of the plurality of base station apparatuses 2. On the other hand, it may be performed individually. At this time, the terminal device 1 may or may not recognize that a plurality of downlink subframes are transmitted from the plurality of base station devices 2. When not recognizing, the terminal device 1 may simply recognize that a plurality of downlink subframes are transmitted in a plurality of cells. The transport block extracting unit 605 determines whether the transport block has been correctly detected, and sends the determination result to the control unit 606.

Here, the transport block extracting unit 605 may include a buffer unit (soft buffer unit). In the buffer unit, information on the extracted transport block can be temporarily stored. For example, when the same transport block (retransmitted transport block) is received, the transport block extracting unit 605 temporarily stores the data in the buffer unit if decoding of the data for the transport block is not successful. The stored data for the transport block and newly received data are combined (combined), and an attempt is made to decode the combined data. The buffer unit flushes the temporarily stored data when the data is no longer needed or when a predetermined condition is satisfied. The condition of data to be flashed differs depending on the type of transport block corresponding to the data. The buffer unit may be prepared for each type of data. For example, a message 3 buffer or a HARQ buffer may be prepared as a buffer unit, or L1 / L2 / L3
For example, it may be prepared for each layer. Note that flushing information / data includes flushing a buffer in which information and data are stored.

  Next, a flow of transmission and reception of an uplink signal will be described. In the terminal device 1, under the instruction of the control unit 606, the downlink reference signal extracted by the downlink reference signal extraction unit 604 is sent to the channel state measurement unit 608, and the channel state measurement unit 608 performs channel state and / or interference. Is measured, and the CSI is calculated based on the measured channel conditions and / or interference. Also, the control unit 606 sends HARQ-ACK (DTX (not transmitted), ACK (detection successful), or NACK (ACK) to the uplink control information generation unit 610 based on the determination result of whether the transport block has been correctly detected. (Detection failure)) and mapping to downlink subframes. The terminal device 1 performs these processes on the downlink subframes of each of the plurality of cells. In uplink control information generating section 610, a PUCCH including the calculated CSI and / or HARQ-ACK or a control channel / shared channel corresponding to the PUCCH is generated. The uplink subframe generation section 609 generates a PUSCH / sPUSCH or a data channel / shared channel corresponding to the PUSCH / sPUSCH including the uplink data transmitted from the upper layer 607 and the PUCCH / PUSCH generated in the uplink control information generation section 610. A control channel corresponding to sPUCCH or PUCCH / sPUCCH is mapped to RBs in an uplink subframe, and an uplink subframe is generated.

  The SC-FDMA signal is received by the SC-FDMA signal receiving unit 509 via the receiving antenna 508, and is subjected to SC-FDMA demodulation processing. The uplink subframe processing unit 510 extracts the RB to which the PUCCH is mapped, and extracts the CSI included in the PUCCH in the uplink control information extraction unit 511 according to an instruction from the control unit 502. The extracted CSI is sent to control section 502. The CSI is used by the control unit 502 to control downlink transmission parameters (MCS, downlink resource allocation, HARQ, etc.). Note that the SC-FDMA signal receiving unit may be an OFDM signal receiving unit. Further, the SC-FDMA signal receiving unit may include an OFDM signal receiving unit.

The base station apparatus assumes the maximum output power P _CMAX set by the terminal apparatus from the power headroom report, and assumes an upper limit value of power for each physical uplink channel based on the physical uplink channel received from the terminal apparatus. I do. The base station device determines the value of the transmission power control command for the physical uplink channel based on those assumptions, and transmits the value to the terminal device using the PDCCH / EPDCCH / sPDCCH accompanied by the downlink control information format. By doing so, power adjustment of the transmission power of the physical uplink channel / signal (or uplink physical channel / physical signal) transmitted from the terminal device is performed.

  When transmitting a PDCCH (EPDCCH) / PDSCH (or a shared channel (sPDSCH) / control channel (sPDCCH) of an LR cell corresponding to these) to a terminal device, the base station device broadcasts a PBCH (or a PBCH). PDCCH / PDSCH resources are allocated so as not to be allocated to (channel) resources.

  The PDSCH / sPDSCH may be used to transmit a message / information regarding each of SIB / RAR / paging / unicast to the terminal device.

Frequency hopping for PUSCH / sPUSCH may be individually set according to the type of grant. For example, the values of parameters used for frequency hopping of the PUSCH / sPUSCH corresponding to each of the dynamic schedule grant, the semi-persistent grant, and the RAR grant may be individually set. Those parameters are
It need not be indicated by an uplink grant. In addition, those parameters may be set via higher layer signaling including system information.

  The various parameters described above may be set for each physical channel. Further, the various parameters described above may be set for each terminal device. Further, the above-described parameters may be commonly set between the terminal devices. Here, the various parameters described above may be set using system information. Further, the various parameters described above may be set using higher layer signaling (RRC signaling, MAC CE). Also, the various parameters described above may be set using PDCCH / EPDCCH / sPDCCH. The various parameters described above may be set as broadcast information. Further, the various parameters described above may be set as unicast information.

In the above-described embodiment, the power value required for each PUSCH / sPUSCH transmission is a parameter set by an upper layer, an adjustment value determined by the number of PRBs allocated to the PUSCH transmission by resource assignment, and a downlink path loss. In addition, the calculation has been described as being calculated based on a coefficient to be multiplied therewith, an adjustment value determined by a parameter indicating an MCS offset applied to the UCI, a correction value obtained by a TPC command, and the like. The power value required for each PUCCH / sPUCCH transmission is an adjustment value determined by a parameter set by an upper layer, a downlink path loss, a UCI transmitted by the PUCCH / sPUCCH, an adjustment value determined by a PUCCH format or an sPUCCH format. , The adjustment value determined by the number of antenna ports used for transmission of the PUCCH / sPUCCH, the value based on the TPC command, and the like have been described. However, it is not limited to this. An upper limit value is set for the required power value, and the minimum value between the value based on the above parameter and the upper limit value (for example, P _{CMAX, c} which is the maximum output power value in the serving cell _c ) is set to the required power value. It can also be used as a value.

  The program that operates on the base station device and the terminal device according to the present embodiment is a program (a program that causes a computer to function) that controls a CPU (Central Processing Unit) and the like so as to realize the function according to the present embodiment. Is also good. Information handled by these devices is temporarily stored in a random access memory (RAM) at the time of processing, and is then stored in various ROMs such as a flash ROM (Read Only Memory) or an HDD (Hard Disk Drive). Reading, correction, and writing are performed by the CPU as necessary.

  Note that a part of the terminal device and / or the base station device in the present embodiment may be realized by a computer. In that case, a program for realizing this control function may be recorded on a computer-readable recording medium, and the program recorded on this recording medium may be read by a computer system and executed.

  The “computer system” is a computer system built in a terminal device or a base station device, and includes hardware such as an OS and peripheral devices. The “computer-readable recording medium” refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, and a CD-ROM, and a storage device such as a hard disk built in a computer system.

Further, a "computer-readable recording medium" is a medium that dynamically holds a program for a short time, such as a communication line for transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a program holding a program for a certain period of time, such as a volatile memory in a computer system serving as a server or a client, may be included. Further, the above-mentioned program may be for realizing a part of the above-mentioned functions, and may be for realizing the above-mentioned functions in combination with a program already recorded in the computer system.

  Further, the base station device in the above-described embodiment can be realized as an aggregate (device group) including a plurality of devices. Each of the devices included in the device group may include a part or all of each function or each functional block of the base station device according to the above-described embodiment. What is necessary is that the device group only has each function or each functional block of the base station device. Further, the terminal device according to the above-described embodiment can also communicate with the base station device as an aggregate.

  Further, the base station device in the above-described embodiment may be an EUTRAN (Evolved Universal Terrestrial Radio Access Network). In addition, the base station device in the above-described embodiment may have some or all of the functions of the upper node for the eNodeB.

  Further, part or all of the terminal device and the base station device in the above-described embodiment may be realized as an LSI, which is typically an integrated circuit, or may be realized as a chipset. Each functional block of the terminal device and the base station device may be individually formed into a chip, or a part or the whole may be integrated and formed into a chip. The method of circuit integration is not limited to an LSI, and may be realized by a dedicated circuit or a general-purpose processor. Further, in the case where a technology for forming an integrated circuit that replaces the LSI appears due to the advance of the semiconductor technology, an integrated circuit based on the technology can be used.

  Further, in the above-described embodiment, the cellular mobile station device (mobile phone, mobile terminal) is described as an example of the terminal device or the communication device. However, the present invention is not limited to this, and may be installed indoors and outdoors. Stationary or non-movable electronic devices such as AV devices, kitchen devices (for example, refrigerators and microwave ovens), cleaning / washing devices, air conditioners, office devices, vending machines, car navigation systems, etc. The present invention can also be applied to a terminal device or a communication device such as a machine or other household equipment.

  As described above, the present embodiment has been described in detail with reference to the drawings. However, the specific configuration is not limited to the present embodiment, and may include a design change or the like without departing from the gist of the present embodiment. Further, the present embodiment can be variously modified within the scope shown in the claims, and the technical scope of the present embodiment also relates to an embodiment obtained by appropriately combining technical means disclosed in different embodiments. include. The elements described in the above-described embodiment also include a configuration in which elements having similar effects are replaced with each other.

  As described above, the present embodiment has the following features.

(1) A terminal device according to one aspect of the present invention is a terminal device that communicates with a base station device, and includes a receiving unit that receives a Downlink Control Information (DCI) format including a Transmission Power Control (TPC) command, and a subframe. n, a PUSCH (Physical Uplink Shared Channel) corresponding to the first DCI format is transmitted in subframe n + A, and when the second DCI format is detected in subframe m, the subframe n is detected. A transmitting unit and the sub-frame, wherein sPUSCH (shortened PUSCH) corresponding to the second DCI format is transmitted at m + B, wherein B is a value smaller than A. Is a subframe after the subframe n, the subframe m + B for transmitting the sPUSCH is a subframe before the subframe n + A for transmitting the PUSCH, and the transmission subframe of the PUSCH and the If the transmission subframe of the sPUSCH belongs to the same uplink power control subframe set in the first serving cell, the first correction value obtained by the TPC command included in the first DCI format is added to the transmission power of the PUSCH. An uplink power control unit that does not apply to the sPUSCH and applies a second correction value obtained by a TPC command included in the second DCI format to the transmission power of the sPUSCH.

  (2) The terminal device according to an aspect of the present invention is the terminal device described above, wherein the uplink power control unit transmits the sPUSCH, wherein the subframe m is a subframe after the subframe n. Sub-frame m + B to be transmitted is a sub-frame after the sub-frame n + A for transmitting the PUSCH, and the transmission sub-frame of the PUSCH and the transmission sub-frame of the sPUSCH are the same in the first serving cell. If it belongs to a subframe set, the first correction value is applied to the transmission power of the PUSCH, and the second correction value is applied to the transmission power of the sPUSCH.

  (3) The terminal device according to one aspect of the present invention is the terminal device described above, wherein the uplink power control unit transmits the sPUSCH when the subframe m is a subframe before the subframe n. The subframe m + B to be transmitted is a subframe before the subframe n + A for transmitting the PUSCH, and the transmission subframe of the PUSCH and the transmission subframe of the sPUSCH are the same in the first serving cell in the uplink power control. If it belongs to a subframe set, the first correction value is applied to the transmission power of the PUSCH, and the second correction value is applied to the transmission power of the sPUSCH.

  (4) The terminal device according to an aspect of the present invention is the terminal device described above, wherein the uplink power control unit is configured such that a transmission subframe of the PUSCH and a transmission subframe of the sPUSCH are different in the first serving cell. If it belongs to the uplink power control subframe set, apply the first correction value to the transmission power of the PUSCH and apply the second correction value to the transmission power of the sPUSCH. .

  (5) The terminal device according to one aspect of the present invention is the terminal device described above, wherein the uplink power control unit transmits the PUSCH and transmits the sPUSCH in a first subframe of the first serving cell. If the transmissions collide and the sPUSCH transmission is included in the second slot in the first subframe, the second correction value is not applied to the PUSCH transmission power.

  (6) The terminal device according to one aspect of the present invention is the terminal device described above, wherein the uplink power control unit transmits the PUSCH and the sPUSCH in the first subframe of the first serving cell. Collides with the transmission of the sPUSCH, and when the transmission of the sPUSCH is included in the second slot in the first subframe, the first correction value is calculated in a subframe next to the first subframe. And applying the second correction value.

  (7) The terminal device according to one aspect of the present invention is the terminal device described above, wherein the transmitting unit performs transmission of the PUSCH and transmission of the sPUSCH in the first subframe of the first serving cell. In the case of collision, and when the transmission of the sPUSCH is included in the first slot in the first subframe, the transmission of the PUSCH is dropped, and the uplink power control unit transmits the first serving cell. The second correction value is applied to the transmission power of the sPUSCH in the first subframe without applying the first correction value.

  (8) A method according to an aspect of the present invention is a method in a terminal device that communicates with a base station device, the method including receiving a DCI (Downlink Control Information) format including a Transmission Power Control (TPC) command, and a subframe. n, when a first DCI format is detected in subframe n + A, a PUSCH (Physical Uplink Shared Channel) corresponding to the first DCI format is transmitted, and when a second DCI format is detected in subframe m, Transmitting a sPUSCH (shortened PUSCH) corresponding to the second DCI format in subframe m + B, wherein B is smaller than A; The subframe m is a subframe after the subframe n, and the subframe m + B for transmitting the sPUSCH is a subframe before the subframe n + A for transmitting the PUSCH, and , If the transmission subframe of the PUSCH and the transmission subframe of the sPUSCH belong to the same uplink power control subframe set in the first serving cell, a first correction obtained by a TPC command included in the first DCI format Applying no value to the transmission power of the PUSCH, and applying a second correction value obtained by a TPC command included in the second DCI format to the transmission power of the sPUSCH; Having.

Reference numeral 501 Upper layer 502 Control unit 503 Codeword generator 504 Downlink subframe generator 505 Downlink reference signal generator 506 OFDM signal transmitter 507 Transmit antenna 508 Receive antenna 509 SC-FDMA signal receiver 510 Uplink subframe processor 511 Uplink control information extracting unit 601 Receiving antenna 602 OFDM signal receiving unit 603 Downlink subframe processing unit 604 Downlink reference signal extracting unit 605 Transport block extracting unit 606 Control unit 607 Upper layer 608 Channel state measuring unit 609 Uplink sub Frame generation section 610 Uplink control information generation sections 611, 612 SC-FDMA signal transmission sections 613, 614 Transmission antenna

Claims (8)

A receiving unit that receives a DCI (Downlink Control Information) format including a TPC (Transmission Power Control) command;
When the first DCI format is detected in the subframe n, a PUSCH (Physical Uplink Shared Channel) corresponding to the first DCI format is transmitted in the subframe n + A,
When the second DCI format is detected in the subframe m, the sPUSCH (shortened PUSCH) corresponding to the second DCI format is transmitted in the subframe m + B, wherein the B is a value smaller than the A, ,
When the subframe m is a subframe after the subframe n, the subframe m + B for transmitting the sPUSCH is a subframe before the subframe n + A for transmitting the PUSCH, and the transmission of the PUSCH When the subframe and the transmission subframe of the sPUSCH belong to the same uplink power control subframe set in the first serving cell, the first correction value obtained by the TPC command included in the first DCI format is set to the PUSCH. An uplink power control unit that does not apply to the transmission power of the sPUSCH and applies a second correction value obtained by a TPC command included in the second DCI format to the transmission power of the sPUSCH; A terminal device comprising: The uplink power control unit,
When the subframe m is a subframe after the subframe n, the subframe m + B for transmitting the sPUSCH is a subframe after the subframe n + A for transmitting the PUSCH, and the transmission of the PUSCH When a subframe and a transmission subframe of the sPUSCH belong to the same uplink power control subframe set in the first serving cell,
Applying the first correction value to the transmission power of the PUSCH,
The terminal device according to claim 1, wherein the second correction value is applied to transmission power of the sPUSCH. The uplink power control unit,
When the subframe m is a subframe before the subframe n, the subframe m + B for transmitting the sPUSCH is a subframe before the subframe n + A for transmitting the PUSCH, and the transmission of the PUSCH When a subframe and a transmission subframe of the sPUSCH belong to the same uplink power control subframe set in the first serving cell,
Applying the first correction value to the transmission power of the PUSCH,
The terminal device according to claim 1 or 2, wherein the second correction value is applied to transmission power of the sPUSCH. The uplink power control unit,
If the PUSCH transmission subframe and the sPUSCH transmission subframe belong to different uplink power control subframe sets in the first serving cell,
Applying the first correction value to the transmission power of the PUSCH,
The terminal device according to claim 1, wherein the second correction value is applied to transmission power of the sPUSCH. The uplink power control unit,
In the first subframe of the first serving cell, the transmission of the PUSCH and the sP
If the transmission of the USCH collides, and if the transmission of the sPUSCH is included in the second slot in the first subframe, the second correction value is not applied to the transmission power of the PUSCH. Item 2. The terminal device according to Item 1. The uplink power control unit,
In the first subframe of the first serving cell, when the transmission of the PUSCH and the transmission of the sPUSCH collide, and the transmission of the sPUSCH is included in a second slot in the first subframe. The terminal device according to claim 5, wherein in the case, the first correction value and the second correction value are applied in a subframe next to the first subframe. The transmission unit,
In the first subframe of the first serving cell, when the transmission of the PUSCH and the transmission of the sPUSCH collide, and the transmission of the sPUSCH is included in a first slot in the first subframe. Drop the PUSCH transmission,
The uplink power control unit,
The terminal device according to claim 5, wherein the second correction value is applied to the transmission power of the sPUSCH in the first subframe of the first serving cell without applying the first correction value. . Receiving a DCI (Downlink Control Information) format including a TPC (Transmission Power Control) command;
Transmitting a PUSCH (Physical Uplink Shared Channel) corresponding to the first DCI format in subframe n + A upon detecting the first DCI format in subframe n;
Transmitting a sPUSCH (shortened PUSCH) corresponding to the second DCI format in subframe m + B upon detecting the second DCI format in subframe m;
B is a smaller value than A,
When the subframe m is a subframe after the subframe n, the subframe m + B for transmitting the sPUSCH is a subframe before the subframe n + A for transmitting the PUSCH, and the transmission of the PUSCH When the subframe and the transmission subframe of the sPUSCH belong to the same uplink power control subframe set in the first serving cell, the first correction value obtained by the TPC command included in the first DCI format is set to the PUSCH. And applying a second correction value obtained by a TPC command included in the second DCI format to the transmission power of the sPUSCH.

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